Size DescriptionA - Total Width - 5.
How does it work? 5" (145 mm) They're designed to: reduce glare (a major cause of eyestrain), increase contrast, and maximize what you see through the lenses making it easier to look at a screen for longer periods of time. Computer glasses are special-purpose eyeglasses meant to optimize your eyesight when you're looking at digital screens. All this activity can strain your eyes and lead to headaches and sleeplessness..