is the most common complaint of computer users.
It is a term that was developed from the lay public-
the eye care professions have no set definition
of it. We have definitions for numerous conditions
which occur throughout the visual system but eyestrain
is not one of them. One tends to think of a muscle
strain as what would happen to a muscle if it were
overworked. In fact, eyestrain is rarely
a tired muscle which causes many of these complaints.
Eyestrain can have many meanings to any number
of people. It can be caused from such problems
as focusing spasm, different vision in each eye,
astigmatism, hyperopia, myopia, excess light,
voluntary focusing, eye coordination difficulties,
In the computer environment, eyestrain- in all
of its manifestations- can also be caused by a
number of different environmental conditions.
It is unfortunate that this is the most common
complaint of computer workers because it is also
the most difficult to evaluate. Many people may
consider the tiring of their eyes as the eyestrain
condition. This is most often caused by a condition
known as convergence insufficiency and can be
easily treated with a simple vision therapy program.
If you feel your eyes strain during
or after computer use, it would be logical to
have further testing done to determine the exact
cause of the complaint.