Takran wrote:These are for reducing eye strain - there is no other purpose to them. If you do not suffer from eye strain due to long periods of computer use, you do not need these (see end of post - you technically don't need them at all). I am one of those people who does not get headaches, and therefore do not own a pair of these. They do not give you any kind of advantage or assistance with gaming.
The 'enhanced' vision that people feel they get is an illusion. Human eyes are more sensitive to light in the "yellow" part of the spectrum - due to the more-sensitive green and red cones in your eye both being activated by yellow light - than any other specific part of the spectrum. The yellow tinted lens reduces overall light input, causing the pupil to dilate to larger than usual, and consequently increasing the amount of yellow light hitting the retina. This gives the surreal illusion of "seeing better", when in reality you've actually lost some visual data through the filtering of the lens' tint. TL;DR: These don't "help" with gaming.
While I personally wouldn't compare a set of yellow glasses to cataracts, I do agree with what inflationary said: you can adjust the tint of your monitor to achieve the same result as far as eye strain reduction due to overly bright whiteness. From my understanding, some people prefer the glasses because it makes everything around them look yellow while they're using the computer, which is less jarring when glancing away from the yellowed monitor to non-yellowed real life.
Good facts here...we just need to dig a little further. The red/green cones are concentrated on the central part of the retina and blue cones are scattered closer to the periphery. Here's where the interesting part comes in. The fovea centralis is the part of the retina where the high level visual processing takes place. Nerve endings are 100x more dense here....and there are almost no blue light receptors. For anyone that has skied on a whiteout day, you'll know that with amber lenses, you can actually see the terrain, but without them, you can't. Why? too much blue light blasting at your eye keeps you from using the most sensitive part of your retina. Filter it out, and you've got more visual sensitivity. Same applies to the computer screen...especially any document with a white background.
Add in the focusing power that relaxes your eyes, and high wrap that keeps your eyes from drying out, and you've got a very robust, doctor recommended solution.
Joe (GUNNAR CEO)