Macular degeneration refers to the deterioration or breakdown of macula which is a very small part of retina in eyes. Although macula is a very small part, it is extremely sensitive to details and it is responsible for the central vision. Normally it started with one eye, so people won't notice it until the central vision obviously dimished. I don't think too much computer will lead to macular degeneration. It is more often related with aging. The caused of macular degeneration include drusen under the retina and abonormal blood vessels growing under retina. Don't worry too much about it. You can go to hospital to ask help from an eye specialist. Patients with advanced macular degeneration cam still see with the side, peripheral vision, although the image might be blurry or distorted,