If we are exposed to working with a computer for long periods of time, it is but natural for us to experience eye strain, blurry vision, redness of the eyes and other types of symptoms of the condition known as computer vision syndrome or CVS. This is why computer glasses have become a necessity in order to be able to withstand the visual demands of computer work.
If you belong to those aged below 40 years old, then the eye strain or the blurry vision that you may be experiencing maybe because of the inability of your eyes to stay focused on your screen or it may be because of the trouble in changing your focus from your keyboard to your screen and then back again for the prolonged periods. These are also associated with the CVS.
However, if you are already aged above 40 years old, then you may be encountering sight problems because of presbyopia which is a normal age-related loss of near focusing ability. This can also contribute to the cause of CVS symptoms.
To start with the correction, it will be best if you will have a comprehensive eye exam in order to rule out other vision problems and also be able to update your eyeglasses prescription. Studies have revealed that small inaccuracies when it comes to prescription lenses can also lead to computer vision problems.
Why Using Computer Glasses Can Be Better
These computer glasses are not the same as regular eyeglasses or reading glasses. This is because there are many ways of optimizing a person’s eyesight when it comes to viewing the computer screen.
Usually, our computer screens are position from 20 to 26 inches from the eyes of the user. This distance is known as the intermediate zone of vision which is closer than the driving or distance vision. However, this distance is also farther away than the reading or near vision.
For children including young adults who are in need of prescription eyeglasses, they are usually prescribed with vision lenses. With these lenses, they will be correcting the nearsightedness, farsightedness, including the astigmatism of the wearer. The shape of the lens of this type of eyeglasses accommodates the inside of the eye and then this will automatically adjust in order to provide the extra magnifying power that is required for computer vision and near vision.
When the close-up vision of a person becomes less clear because of the presbyopia due to age, this is going to eventually affect the reading and the seeing abilities of a smartphone or computer vision. By using bifocals, this will be able to provide the person with clear distance and near vision, still, immediate vision will often remain to be a problem.
If a person prefers to not use computer glasses, such a person may end up with a blurry vision, eye strain, and headaches which are the hallmark symptoms of computer vision syndrome. What is even worse is that there are a lot of people who are trying to compensate for their blurred vision by leaning forward, or by tipping their head in order to look through the bottom portion of their glasses. These actions can make you end up with sore neck, sore shoulders, including a sore back.
These types of glasses are sometimes referred to as “computer reading glasses”. However, it is still best to call them “computer glasses” or “computer eyeglasses” as they are the type of eyewear specifically designed for computer use. This is also to distinguish them from conventional reading glasses.
For most, these computer glasses have around 60 percent of the magnifying power as compared to reading glasses. However, the optimal magnification is still going to depend on how far you want to sit from your computer screen and how close you want to hold your digital devices.
If you are suffering from astigmatism, the computer glass should be able to correct such condition, and the precise measurements should also be taken in order to make sure that the optical center of each lens is going to be directly in front of your pupils especially when you are using your preferred working distance.
The Lens Design for Computer Glasses
There are a lot of special-purpose lens designs that are also working well for computer glasses. The reason is that these type of lenses are prescribed specifically for computer use, this means that these are not suitable for diving or for general purpose wear.
The Single Vision Lenses
Single vision lenses are the simplest form of computer glasses as these have modified lens power prescribed to give the most of the comfortable vision at the user’s computer screen.
The power of this lens is to relax the amount of accommodation that is required in keeping objects in focus at the distance of the computer screen and this also provides the largest field of view.
For single-vision computer glasses, this will help in the reduction of the risk of eye strain, blurry vision and unnatural posture that may be contributory factors for neck and back pain. This type of computer glasses can be used comfortably by both the young and the old computer uses.
The Occupational Progressive Lenses
This type of lens is a no-line multifocal that helps in correcting near, intermediate, and, up to a point, distance vision.
With the occupational progressive lenses, these have a larger intermediate zone as compared to the regular progressive lenses in order to have a more comfortable vision at the computer. However, this is going to leave less lens area for distance vision, so these lenses are not really recommended for driving or other tasks that entail other significant distance vision.
Other types of computer glasses lens include occupational bifocal and trifocal lenses. These types of line multifocal lenses have larger zones when it comes to intermediate and near vision as compared to the regular bifocals and trifocals, and the position of these intermediate and near zones can also be customized for the particular computer needs of the user.