For young people, the most common vision problem is distance vision, thus most people under 40 who wear glasses or contacts are nearsighted. In general, as people age they become more and more likely to become farsighted. Sometimes this can be addressed with inexpensive reading glasses off the shelf, but sometimes the better option is to obtain prescription lenses for near vision correction. The need for bifocal reading glasses arises when someone who was nearsighted in his or her youth also becomes farsighted as he or she ages.
Most bifocals prescribed for individuals beyond the age of 40 — often prescribed because they’ve developed presbyopia — correct far and near vision. Yet these glasses do not provide an appropriate lens for the distance and eye activity involved in computer work. Some people believe trifocals and progressive lenses — both of which provide a portion of lens for intermediate distance vision — can be utilized for computer work. However, these lenses don’t provide nearly enough surface space to ease and protect eyes for extended periods of computer use.
Many computer users will suffer headaches, eye strain and blurred vision if they do not utilize appropriate computer glasses. Such symptoms indicate computer vision syndrome. These problems compound themselves with further issues when computer users without computer glasses attempt to adjust for their strained eyes or blurry vision by tilting their head to view the monitor through the bottom of their glasses or by excessively leaning towards the monitor. Such behavior leads to sore back, shoulders and neck problems.
I understand how Bifocal Reading Glasses may not seem like the most appropriate place for an extensive discussion on computer glasses, but since everyone viewing this site must, of course, be viewing it on a computer monitor, I still think it is an important issue.
Read Computer Glasses