Computer vision syndrome has been very prominent in the news recently.
The issue even captured the attention of the New York Times; it affects millions of people including children and adolescents who spend many hours a day on computers, laptops and hand-held devices.
CVS can result in visual symptoms like blurred or double vision, burning, itching, extreme dryness plus the redness of the eyes. It also can cause tension headaches and even lower back pain. All of those symptoms can interfere with work, performance and overall comfort of our life.
This makes for a huge issue and has been repeatedly explained in mainstream media: Unlike printed words, which have sharply defined edges and stark contrast on the page, electronic print is pixelated with blurred edges and makes more difficult for the eyes to main their focus. Unconsciously, we attempt to clear the image with little success and resultant strain of eye muscles and the same time minimizing our blink rate. Progressive lens wearers are even at larger risk because of progressive lens corridor.
Naturally, society is not willing to give up our iPhone, iPod, Kindles and of course computers; so, it is very important to minimize impact of CVS. Simple steps such as proper positioning of computer at the desk are very important to maintain. Optimally, the computer screen should be 15-20 degree below eye level and about 20-28 inches away from the face.
Taking 20 seconds breaks every 20 minutes to look 20 feet away is very important to relax the eye muscles. Proper eyewear is equally important as well as correct color of antireflection coating (AR) for your needs and possibly a separate pair of glasses for use at the computer only. The power of occupational pair of glasses can be custom adjusted exactly to the distance to the computer screen( working distance ) and be different from reading glasses since it meant to be at 16-18 inches working distances.