Many people think that switching from glasses to contact lenses will be difficult, but actually it is really not that hard at all. Nowadays many people are turning to contact lenses since they offer a comfortable and easy way to enhance your vision. eyeglassesContact lenses have also become very affordable.
Contact lenses are a much better choice than glasses for many people, but if you want to make the switch from glasses to contacts, there are a few things that you will need to know.
First of all, if you want to get contact lenses, you will have to make an appointment with your eye doctor for a contact lens fitting.eye glasses At this appointment, your doctor will check out your eyes, figure out your prescription, and help you choose the lenses that will work best for your eyes. They can also help you find contact lenses that work best with your budget too.
There are a variety of different contact lenses you can choose from. There are different types, manufacturers, styles, and colors; however, not every type is going to be suitable for your eyes. You optician can help you make a good decision about which contact lenses will be the very best for your eyes and your personal circumstances.
Once you start wearing your new contacts, it is important that you do not immediately wear them for too long periods. It will take your eyes quite some time to adjust to the new contacts and, also very important, the contacts will have to adjust to your eyes as well. Wearing your contacts for extended periods of time when you first get them can actually harm your eyes. Your eye doctor will give you an indication about how long you should wear them for the first few days. Each following day you can wear the contacts a little bit longer until your eyes are adjusted to wearing them.
When you decide to switch from glasses to contacts, you will also need to learn how to properly handle and take care of your contact lenses. It is extremely important that you always clean your hands very well before you touch your lenses. This will help to avoid you damaging or scratching your contacts. Whenever you are going to put your contacts in or take them out, you are going to have to touch them, so be sure to clean your hands first.
Many people find that they experience dry eyes when they first start wearing contact lenses. This is a very normal occurrence that new contact lens wearers have to deal with. You can purchase a saline solution or a re-wetting solution for your eyes, and when they get dry you can insert a few drops of the solution into your eyes. This will help give your eyes the moisture and relief that they need and will also help you get rid of the irritation.
With no doubt you had to clean your glasses on a regular basis. It is also imperative that you disinfect and clean your contact lenses every single day. When you wear your lenses, proteins will build up on them, which will require that you clean them with an appropriate solution each day. Usually you can easily do this by making sure that your contacts get soaked in the solution overnight. When you get up in the morning, your contacts will be clean and ready for you to wear again.
Most people find that they prefer contact lenses over glasses. Usually you will have to change your contacts out for a fresh, new pair every few weeks. This will prevent your eyes from getting infections. Almost anyone can benefit from wearing contact lenses and they provide you with a wider range of sight than glasses. They are also great for people who are very active, since they will not have to worry about their glasses falling off or getting broken while participating in physical activities.
2008年9月25日星期四
2008年9月22日星期一
Vision Care Insurance
Most optometrists will recommend to patients to take care of their eyesight through regular eye exams and by following a good nutritional plan. eyeglass lensesFamilies can usually handle the nutrition regimen on their own, but will often rely on vision care insurance to help pay the costs of regular eye examinations. eyewear framesMany family members will need vision checks throughout the year, and the costs can escalate when eyeglasses are needed to correct a vision deficiency in one or both eyes.
Many people are able to select a vision care plan through the place where they work. eyeglasses onlineSome families get two vision care insurance policies because there are elderly people at home. All of the dependents will receive insurance coverage for eye exams, and every two years, the vision care insurance will cover the cost of new eyeglasses because the patients vision needs have changed.eyeglass frames Some people require eye exams at other times due to eye injuries and these are the situations where visits to the optometrist would be covered under the extra vision care insurance.
Vision care insurance plans can be tailored to meet many needs. optical eyeglassesSome people want to have lasik eye surgery performed because they are tired of wearing glasses and are unable to wear contact lens because of misshapen corneas or a current eye disease. Some vision care plans will cover this surgery election but many will not because most eye care professionals deem this type of surgery as elective surgery which is a service that is not considered urgent or necessary.
When vision care insurance plans do not cover eye procedures that will make a noticeable difference to vision, eye patients have found through research that there are other choices available to them.prescription eyewear Many Lasik eye surgeries are offered through competent surgeons that are part of a medical group. Surgical patients can ask for help with making payments over and extended period and whichever Lasik surgery is performed, the entire cost can be financed by the medical group for a soptical glassespecific period.
All vision care insurance plans allow discounts through various organizations. Elderly people join retirement groups that give great discounts on certain vision care services. The discount prices are applied after insurance plans have paid a portion of the bill and elderly people appreciate this type of service. The services that are covered under these discounted vision care benefits can be items that fall under the eyewear category or eye care services received that day. Further discounts will apply to all claims filed at other times of the yearglasses lens.
Although many people participate in vision care programs that are not obtained through work, many people might not know that some programs are not endorsed by all eye care professionals. In order to reap the discounts for vision care received at a reputable eye care salon all customers must do is file paperwork and send to the insurance company. The other discounts may not be authorized at every place and customers will need to insure that each vision care rebate program is going to be honored before eye care services are performedprescription lenses.
Many people are able to select a vision care plan through the place where they work. eyeglasses onlineSome families get two vision care insurance policies because there are elderly people at home. All of the dependents will receive insurance coverage for eye exams, and every two years, the vision care insurance will cover the cost of new eyeglasses because the patients vision needs have changed.eyeglass frames Some people require eye exams at other times due to eye injuries and these are the situations where visits to the optometrist would be covered under the extra vision care insurance.
Vision care insurance plans can be tailored to meet many needs. optical eyeglassesSome people want to have lasik eye surgery performed because they are tired of wearing glasses and are unable to wear contact lens because of misshapen corneas or a current eye disease. Some vision care plans will cover this surgery election but many will not because most eye care professionals deem this type of surgery as elective surgery which is a service that is not considered urgent or necessary.
When vision care insurance plans do not cover eye procedures that will make a noticeable difference to vision, eye patients have found through research that there are other choices available to them.prescription eyewear Many Lasik eye surgeries are offered through competent surgeons that are part of a medical group. Surgical patients can ask for help with making payments over and extended period and whichever Lasik surgery is performed, the entire cost can be financed by the medical group for a soptical glassespecific period.
All vision care insurance plans allow discounts through various organizations. Elderly people join retirement groups that give great discounts on certain vision care services. The discount prices are applied after insurance plans have paid a portion of the bill and elderly people appreciate this type of service. The services that are covered under these discounted vision care benefits can be items that fall under the eyewear category or eye care services received that day. Further discounts will apply to all claims filed at other times of the yearglasses lens.
Although many people participate in vision care programs that are not obtained through work, many people might not know that some programs are not endorsed by all eye care professionals. In order to reap the discounts for vision care received at a reputable eye care salon all customers must do is file paperwork and send to the insurance company. The other discounts may not be authorized at every place and customers will need to insure that each vision care rebate program is going to be honored before eye care services are performedprescription lenses.
2008年9月11日星期四
Do Contact Lenses Make Your Vision Worse?
Whether you are a new user of eyeglasses or have worn glasses your entire life, you may be considering switching to corrective contact lenses. Contact lenses offer comfort in many different ways, and also have an advantage from an aesthetic point of view. No matter what your motivation is, you may be considering contact lenses as an option if you have been
Discount Tiffany Pendants diagnosed with or suffer from any of the following conditions:
Myopia (nearsightedness) Hyperopia (farsightedness) Astigmatism (distorted vision) Presbyopia (need for bifocals)
If you are considering using corrective contact lenses, you should only do so under the strict supervision of a qualified eye care professional - preferably an ophthalmologist or a contact lens specialist. You should be prepared before going in to your eye care appointment by being aware of the different types of contact lenses that are available in the marketplace. This will help give you a head start in choosing the type of prescription contact lenses that are right for you. The types of contacts that are widelyDiscount Tiffany Pendantsavailable include the following:
Rigid Gas-permeable Contact Lenses (RGP's) Soft Contact Lenses o Extended Wear Contact Lenses o Disposable Contact Lenses
Will my sight worsen if I start wearing prescription contact lenses?
Many people who are considering wearing corrective contact lenses to correct their vision issues are concerned about the possibility of harming their vision further simply by using contact lenses. They may have heard stories or rumors, or may even just have apprehensions about inserting a foreign object into their eye. First of all, contact lenses should be worn only when prescribed by an ophthalmologist, eye care professional or contact lens specialist. Corrective lenses should only be prescribed after a proper eye exam and diagnosis of one of the following: myopia, hyperopia, astigmatism or presbyopia. Involving a professional from the very beginning will ensure that your eye care is appropriateDiscount Tiffany Rings, adequate and safe. The Answer is NO!
According to the eye care experts, a corrective contact lens prescription will not make your vision problems worse. Many times when a person tries on contact lenses for the first time, there will be an adjustment period. At first the contact lenses may feel a bit uncomfortable and strange. If you are used to wearing regular eyeglasses, you may be taken aback by the fact that your peripheral vision is so much better with the contact lenses. In any case, whether you're trying the contact lenses as your first option when diagnosed with vision problems or trying them after using glasses for any period of time, the visual improvement you will experience may be extraordinary. This amazing improvement may make vision without the contacts seem much worse than it actually is, especially the longer your eyes are allowed to grow accustomed to them.Discount Tiffany Rings
This phenomenon can simply be attributed to the fact that the brain now has a reference point for comparing two images directly: the first one with corrective lenses and the latter one without. Prior to this it had nothing to which a real comparison could be made. Because of this, vision did not seem quite as unclear and blurred, when in fact it really was.
The bottom line is, with proper care and use; contact lenses should not affect your vision in a negative way. Using corrective contact lenses under the care of a contact lens specialist will ensure you are minimizing any chances of causing damage to your eyes.
Discount Tiffany Pendants diagnosed with or suffer from any of the following conditions:
Myopia (nearsightedness) Hyperopia (farsightedness) Astigmatism (distorted vision) Presbyopia (need for bifocals)
If you are considering using corrective contact lenses, you should only do so under the strict supervision of a qualified eye care professional - preferably an ophthalmologist or a contact lens specialist. You should be prepared before going in to your eye care appointment by being aware of the different types of contact lenses that are available in the marketplace. This will help give you a head start in choosing the type of prescription contact lenses that are right for you. The types of contacts that are widelyDiscount Tiffany Pendantsavailable include the following:
Rigid Gas-permeable Contact Lenses (RGP's) Soft Contact Lenses o Extended Wear Contact Lenses o Disposable Contact Lenses
Will my sight worsen if I start wearing prescription contact lenses?
Many people who are considering wearing corrective contact lenses to correct their vision issues are concerned about the possibility of harming their vision further simply by using contact lenses. They may have heard stories or rumors, or may even just have apprehensions about inserting a foreign object into their eye. First of all, contact lenses should be worn only when prescribed by an ophthalmologist, eye care professional or contact lens specialist. Corrective lenses should only be prescribed after a proper eye exam and diagnosis of one of the following: myopia, hyperopia, astigmatism or presbyopia. Involving a professional from the very beginning will ensure that your eye care is appropriateDiscount Tiffany Rings, adequate and safe. The Answer is NO!
According to the eye care experts, a corrective contact lens prescription will not make your vision problems worse. Many times when a person tries on contact lenses for the first time, there will be an adjustment period. At first the contact lenses may feel a bit uncomfortable and strange. If you are used to wearing regular eyeglasses, you may be taken aback by the fact that your peripheral vision is so much better with the contact lenses. In any case, whether you're trying the contact lenses as your first option when diagnosed with vision problems or trying them after using glasses for any period of time, the visual improvement you will experience may be extraordinary. This amazing improvement may make vision without the contacts seem much worse than it actually is, especially the longer your eyes are allowed to grow accustomed to them.Discount Tiffany Rings
This phenomenon can simply be attributed to the fact that the brain now has a reference point for comparing two images directly: the first one with corrective lenses and the latter one without. Prior to this it had nothing to which a real comparison could be made. Because of this, vision did not seem quite as unclear and blurred, when in fact it really was.
The bottom line is, with proper care and use; contact lenses should not affect your vision in a negative way. Using corrective contact lenses under the care of a contact lens specialist will ensure you are minimizing any chances of causing damage to your eyes.
2008年9月10日星期三
Magnifiers will help low vision
Vision Problems Benefit From the Attention of Low Vision Specialistseyeglass frames
Correcting vision problems is the domain of low vision specialists.optical eyeglasses Comprised primarily of optometrists and ophthalmologists, these specialists deal with maximizing the remaining vision you do have, in order for you to enjoy the activities of daily life. prescription eyewearThey provide solutions to eye vision problems, including products such as magnifiers and bioptic glasses,optical glasses in order to improve your visual range.
What Types of Vision Problems Can Be Helped with the Aid of Low Vision Specialists?glasses lens
Low vision can be caused by several different means. Some individuals are genetically predisposed to developing low vision,
classic eyeglasses such as some that have macular degeneration. Diabetics sometimes have eye vision problems related to background retinopathy in the eyes. People with albinism often have sight problems related to that medical condition. bifocal eyeglassesSome individuals have sudden vision problems due to accidents.
Happily, many vision problems have solutions. Consulting with a vision specialist is key to correcting vision problems.
prescription sunglasses
What Are Some of The Solutions For Those With Lessened Visual Acuity?rimless glasses
The vision solutions that could work best for you depend upon what types of vision loss you have. If, for example, you have macular degeneration,rimless eyewear
you will likely have a loss of central vision, because the macula, seated in the rear portion of the retina, controls that visual range.tiffany and co. But central vision consists of only thirty percent of the total visual field, so the good news is that your peripheral vision will likely remain unharmed and entirely usabletiffany and co.The key with central vision loss is to magnify the visual field for close vision, and use tiny microscopes attached to the glasses for improving distance vision.Discounted Tiffany
Discounted Tiffany
Central vision is used for reading, watching television, or working on craft projects. It is also used for working at the computer, writing, taking in a play or movie as well as driving.Tiffany jewely Magnification can make it much easier to perform these activities,Cheap Tiffany Necklacesand which type of magnifier you choose will depend on the specific task you Cheap Tiffany Necklaceswish to perform.Cheap Tiffany Necklaces For instance, if you are doing hand crafts such as sewing or knitting, then a hand-held magnifier would not be suitable.Cheap Tiffany Bracelets Instead, there are magnified glass lenses that can be inserted into eye glass frames that will allow you to enjoy these activities. Long-distance vision, used for watching movies and plays, as well as for driving, requires a different type of magnification. Cheap Tiffany BraceletsTypically specialists will have you consider using telescopic glasses. These glasses look like regular eyeglasses,Cheap Tiffany Earrings except that tiny telescopes are attached to the top of the lenses.Cheap Tiffany Pendants The lenses consist of your prescription appropriate for your peripheral vision. You change your field of vision by moving your head slightly up or down,Cheap Tiffany Rings much as you would when wearing a pair of bifocals. Tiffany Japan
Correcting vision problems is the domain of low vision specialists.optical eyeglasses Comprised primarily of optometrists and ophthalmologists, these specialists deal with maximizing the remaining vision you do have, in order for you to enjoy the activities of daily life. prescription eyewearThey provide solutions to eye vision problems, including products such as magnifiers and bioptic glasses,optical glasses in order to improve your visual range.
What Types of Vision Problems Can Be Helped with the Aid of Low Vision Specialists?glasses lens
Low vision can be caused by several different means. Some individuals are genetically predisposed to developing low vision,
classic eyeglasses such as some that have macular degeneration. Diabetics sometimes have eye vision problems related to background retinopathy in the eyes. People with albinism often have sight problems related to that medical condition. bifocal eyeglassesSome individuals have sudden vision problems due to accidents.
Happily, many vision problems have solutions. Consulting with a vision specialist is key to correcting vision problems.
prescription sunglasses
What Are Some of The Solutions For Those With Lessened Visual Acuity?rimless glasses
The vision solutions that could work best for you depend upon what types of vision loss you have. If, for example, you have macular degeneration,rimless eyewear
you will likely have a loss of central vision, because the macula, seated in the rear portion of the retina, controls that visual range.tiffany and co. But central vision consists of only thirty percent of the total visual field, so the good news is that your peripheral vision will likely remain unharmed and entirely usabletiffany and co.The key with central vision loss is to magnify the visual field for close vision, and use tiny microscopes attached to the glasses for improving distance vision.Discounted Tiffany
Discounted Tiffany
Central vision is used for reading, watching television, or working on craft projects. It is also used for working at the computer, writing, taking in a play or movie as well as driving.Tiffany jewely Magnification can make it much easier to perform these activities,Cheap Tiffany Necklacesand which type of magnifier you choose will depend on the specific task you Cheap Tiffany Necklaceswish to perform.Cheap Tiffany Necklaces For instance, if you are doing hand crafts such as sewing or knitting, then a hand-held magnifier would not be suitable.Cheap Tiffany Bracelets Instead, there are magnified glass lenses that can be inserted into eye glass frames that will allow you to enjoy these activities. Long-distance vision, used for watching movies and plays, as well as for driving, requires a different type of magnification. Cheap Tiffany BraceletsTypically specialists will have you consider using telescopic glasses. These glasses look like regular eyeglasses,Cheap Tiffany Earrings except that tiny telescopes are attached to the top of the lenses.Cheap Tiffany Pendants The lenses consist of your prescription appropriate for your peripheral vision. You change your field of vision by moving your head slightly up or down,Cheap Tiffany Rings much as you would when wearing a pair of bifocals. Tiffany Japan
An introduction to computer glasses
Today the world is of computer and about 80% of people work on computer on a regular basis. Staring at flat screen for hours together may cause eyestrain, headaches, dry eyes, blazing, and blurred vision, this is known as computer vision syndrome (CVS). Computer protective glasses could protect you from CVS by improving your vision with or with no prescription. Computer glasses could as well block risky ultra-violet (UV) rays and lessen glare, both of which have been associated to cataracts.
People who wear contact lenses or any other corrective glasses, one difficulty of spending huge hours at the computer is that the standard distance to a computer screen is further away than reading material, but closer than far vision. Bifocals lenses used for readings are not optimized for work at a computer and as reading material is detained in the lap, a computer screen lies dull ahead. It forces bifocal wearers to tip the head up that could generate neck pain and shoulder strain. It might as well cause one to bend in towards the screen to lessen the distance to the range the bifocals are intended to correct.
In other case if you don’t spend long hours at the computer screen to skill CVS, but desire to protect your eyes from glare and damaging radiation, high excellence non-prescription glasses with polarized lenses and UV blockage would serve as outstanding computer glasses. You could also have an optometrist make a pair that is suitable for you, or you could choose to purchase slightly-tinted, optically apt, polarized sunglasses with 100% UV blockage. High quality sunglasses are as well accessible in most sporting goods stores, usually kept in display cases.
If you would like computer glasses, which could double as sunglasses, deem to photo chromic lenses. These lenses ease indoors, and dim outdoors. Polarized sunglasses could further serve you as flexible and suitable computer sunglasses. Photo chromic lenses are too accessible in prescriptions. Computer glasses must be fault free. If you hold the glasses at arm’s span and look through the lenses, they must not waver or deform what lies beyond them. Lenses are accessible in frivolous polycarbonate plastic, or for those with huge prescriptions, in high-index plastic. See your optometrist for a computer test to determine the best prescription, and get rid of your eye fatigue.
People who wear contact lenses or any other corrective glasses, one difficulty of spending huge hours at the computer is that the standard distance to a computer screen is further away than reading material, but closer than far vision. Bifocals lenses used for readings are not optimized for work at a computer and as reading material is detained in the lap, a computer screen lies dull ahead. It forces bifocal wearers to tip the head up that could generate neck pain and shoulder strain. It might as well cause one to bend in towards the screen to lessen the distance to the range the bifocals are intended to correct.
In other case if you don’t spend long hours at the computer screen to skill CVS, but desire to protect your eyes from glare and damaging radiation, high excellence non-prescription glasses with polarized lenses and UV blockage would serve as outstanding computer glasses. You could also have an optometrist make a pair that is suitable for you, or you could choose to purchase slightly-tinted, optically apt, polarized sunglasses with 100% UV blockage. High quality sunglasses are as well accessible in most sporting goods stores, usually kept in display cases.
If you would like computer glasses, which could double as sunglasses, deem to photo chromic lenses. These lenses ease indoors, and dim outdoors. Polarized sunglasses could further serve you as flexible and suitable computer sunglasses. Photo chromic lenses are too accessible in prescriptions. Computer glasses must be fault free. If you hold the glasses at arm’s span and look through the lenses, they must not waver or deform what lies beyond them. Lenses are accessible in frivolous polycarbonate plastic, or for those with huge prescriptions, in high-index plastic. See your optometrist for a computer test to determine the best prescription, and get rid of your eye fatigue.
2008年9月9日星期二
Computer Glasses for Computer Vision Syndrome Sufferers
The majority of people who suffer from the symptoms of Computer Vision Syndrome (CVS) - blurred vision, eyestrain and burning - are middle-aged and presbyopic. Presbiopia is the inability to focus at all distances with symptoms including squinting and headaches.
So, getting computer glasses can transform the office environment for millions of workers at their workstations. As the glasses correct the intermediate zone of your vision, which is the typical distance (20-24") from your eye to the computer monitor screen, they enable the eye muscles to move from keyboard to monitor and back more easily. This alleviates the CVS symptoms of blurred vision and eyestrain.
Perhaps you are sceptical of the need for specific computer glasses and consider them an unnecessary expense: less emphasis has traditionally been placed on computer-induced vision problems than on the ergonomic layout of the workstation. Buying a pair of inexpensive, single-vision (intermediate) lenses off the rack might, then, seem a good idea.
Unfortunately, as most people who need computer glasses also need their vision corrected in the near, and maybe far, zones as well, ready to wear, single-vision glasses don't usually fit the bill. Nor do cheaper, tinted glasses help presbyopic individuals. The pupil dilation, which results from reduced light entering the eye, can exacerbate the problem of blurred vision and eyestrain.
Let's move now from the cheapest, ready to wear, computer glasses to affordable, but more expensive, eyewear with a greater degree of customization. Lenses can be selected to match the requirements of each eye. This gives you a pair of bifocal reading glasses with the upper area optimized for reading text on your monitor, and the bifocal area set to allow the correct focal distance for the keyboard and desktop.
Customization of the individual lenses, however, is sometimes not enough to prevent 'prism' which occurs when your eye movements are not perfectly synchronised. To overcome this problem, a choice of nose bridges is often made available which realigns the distance between pupils and removes this particular cause of eyestrain.
These "do-it-yourself" computer glasses, which require you to find out your existing "add" prescription for each eye, are stylish and lightweight. They also come with anti-reflective coatings. Not only do these reduce the glare from ambient lighting in the workplace, which adversely affects the eye's ability to focus clearly on the monitor, but they also increase the scratch resistance of the lens.
The best possible solution, of course, is computer glasses made to match the requirements of your exact prescription and workplace setup. Fulfilling these requirements means a visit to your eye doctor and a willingness to pay more for your eyewear. Seeking professional help represents, for most people, the safest option.
The more popular styles are the multifocals, particularly the progressive (no-line) lenses. These have a larger intermediate zone than normal progressives and allow you to see clearly in all zones (near, intermediate and far) at the same time while at work.
However, in occupational progressive lens and lined trifocals, there is a trade-off between a larger intermediate zone and distance viewing. Both will allow you to see adequately in an office environment, but they are not suitable for wear outside the office.
This problem of one pair of glasses for normal use and a dedicated pair for computer use, can be obviated by the use of clip-ons. Provided you are fortunate enough to need two prescriptions only in your lenses (intermediate and near or intermediate and far). You can wear your regular prescription lens in the glasses and the computer lens in the clip.
Finally, there is a question of tinted lenses in computer glasses. Opinions seem to vary on their use in reducing excessive "blue light" spectrum. As we have seen, an ultraviolet coating can filter out much of the blue light which reaches the eye from harsh fluorescent lighting.
The jury seems to be out, though, when it comes to amber-tinted computer glasses. Many sportsmen use them to cut down glare from a bright sun, but, in the workplace, their use is not always thought to be beneficial. Some people believe the resulting cut in light transmission and the concomitant increase in use of the eyes focusing muscles, can aggrevate the very condition - eyestrain - which the tint is supposed to alleviate.
Choose your computer glasses wisely, but if your blurred vision continues, look at your work habits and evaluate whether your working environment is ergonomically sound.
So, getting computer glasses can transform the office environment for millions of workers at their workstations. As the glasses correct the intermediate zone of your vision, which is the typical distance (20-24") from your eye to the computer monitor screen, they enable the eye muscles to move from keyboard to monitor and back more easily. This alleviates the CVS symptoms of blurred vision and eyestrain.
Perhaps you are sceptical of the need for specific computer glasses and consider them an unnecessary expense: less emphasis has traditionally been placed on computer-induced vision problems than on the ergonomic layout of the workstation. Buying a pair of inexpensive, single-vision (intermediate) lenses off the rack might, then, seem a good idea.
Unfortunately, as most people who need computer glasses also need their vision corrected in the near, and maybe far, zones as well, ready to wear, single-vision glasses don't usually fit the bill. Nor do cheaper, tinted glasses help presbyopic individuals. The pupil dilation, which results from reduced light entering the eye, can exacerbate the problem of blurred vision and eyestrain.
Let's move now from the cheapest, ready to wear, computer glasses to affordable, but more expensive, eyewear with a greater degree of customization. Lenses can be selected to match the requirements of each eye. This gives you a pair of bifocal reading glasses with the upper area optimized for reading text on your monitor, and the bifocal area set to allow the correct focal distance for the keyboard and desktop.
Customization of the individual lenses, however, is sometimes not enough to prevent 'prism' which occurs when your eye movements are not perfectly synchronised. To overcome this problem, a choice of nose bridges is often made available which realigns the distance between pupils and removes this particular cause of eyestrain.
These "do-it-yourself" computer glasses, which require you to find out your existing "add" prescription for each eye, are stylish and lightweight. They also come with anti-reflective coatings. Not only do these reduce the glare from ambient lighting in the workplace, which adversely affects the eye's ability to focus clearly on the monitor, but they also increase the scratch resistance of the lens.
The best possible solution, of course, is computer glasses made to match the requirements of your exact prescription and workplace setup. Fulfilling these requirements means a visit to your eye doctor and a willingness to pay more for your eyewear. Seeking professional help represents, for most people, the safest option.
The more popular styles are the multifocals, particularly the progressive (no-line) lenses. These have a larger intermediate zone than normal progressives and allow you to see clearly in all zones (near, intermediate and far) at the same time while at work.
However, in occupational progressive lens and lined trifocals, there is a trade-off between a larger intermediate zone and distance viewing. Both will allow you to see adequately in an office environment, but they are not suitable for wear outside the office.
This problem of one pair of glasses for normal use and a dedicated pair for computer use, can be obviated by the use of clip-ons. Provided you are fortunate enough to need two prescriptions only in your lenses (intermediate and near or intermediate and far). You can wear your regular prescription lens in the glasses and the computer lens in the clip.
Finally, there is a question of tinted lenses in computer glasses. Opinions seem to vary on their use in reducing excessive "blue light" spectrum. As we have seen, an ultraviolet coating can filter out much of the blue light which reaches the eye from harsh fluorescent lighting.
The jury seems to be out, though, when it comes to amber-tinted computer glasses. Many sportsmen use them to cut down glare from a bright sun, but, in the workplace, their use is not always thought to be beneficial. Some people believe the resulting cut in light transmission and the concomitant increase in use of the eyes focusing muscles, can aggrevate the very condition - eyestrain - which the tint is supposed to alleviate.
Choose your computer glasses wisely, but if your blurred vision continues, look at your work habits and evaluate whether your working environment is ergonomically sound.
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