What are computer glasses Or Computer Vision Syndrome (CVS)?
For people who work at a computer or at some other mid-length space (like sewing at a machine) these glasses can provide the right type of focus for that length. Because computers are at distance from the eyes further than a book (when reading) this mid-prescription maybe be necessary for some to avoid the strain and weariness that comes from prolonged reading/working at this distance that is too far for reading glasses yet too close for distance glasses. As our population becomes more and more computer focused it is of not surprise that more people would need glasses for this specifically
Well here there are two scenarios,
Your prescription has progressively gotten stronger and you can no longer read with you single vision glasses. In fact anything closer than 18" or so inches becomes hard to decipher. This is very uncomfortable if you read for most of the day, work on the computer, or do some type of sewing/needlework or any such work for any length of the day. You doctor may in fact, suggest computer glasses
that are basically half your regular prescription, which will enable you to comfortable doing this type of work for the better part of the day.
You are on the computer all day long and the eyes are tired, blurry, teary and otherwise uncomfortable. In this case, the doctor may also suggest computer glasses. Some say having a light tint is helpful, others say having UV protection or anti-glare protection added to your lens reduces the glare and thus reduce eye strain.
If you don't need any type of correction, having a tint on non-prescription glasses
maybe the way to go.... Some seem to think so.
Checking with you optometrist or ophthalmologist would be the best way to asses this and deciphering what type of vision correction you may need. Be sure to assess your work space so that you can reliably recount to the vision care specialist, including the type of lighting as well as the various distances of your computer monitor/s.
Remember though that the computer glasses are for closer distances (20"-26"). Blurry eyesight maybe present for longer or closer distances depending on the correction type you need.
Available in computer glasses are:
~ these are the easiest and are basically the vision correction you would need at about 20" to 26" distance. These give the largest field of vision because the whole lenses are used for a single correction value.
Computer Bifocal Lenses ~
these would have a line at the lower portion of the lenses. The top part of the lenses has the correction value for focusing on the computer and the lower for reading at a much closer distance (10"-18").
Computer Progressive Lenses
~ these are a misnomer really as progressive lenses have three levels to them; the distance value, the mid-value or intermediate (which would be for computers) and the reading value. Some actually have a hard time reading the computer with progressive glasses on, this may be because of the narrower field of vision available in the mid-value intermediate range.
Studies suggest that, over time, exposure to the blue end of the light spectrum could cause serious long-term damage to your eyes.
Exposure to Blue Light comes from: Computers, Cell Phones & other mobiles Television, The Sun Florescent & Led Lighting
Max. power range is sph: 0 to -8.00 cyl: 0 to -2.00.
*It is very important that when you buy eyewear online be sure to specify if your prescription is for computer glasses as prescribed by your eyecare professional.*