Though heredity seems to play a significant role in the development of myopia in childhood, some research suggests that eye strain, and specifically computer eye strain, may also be involved.
To see clearly up close, the eye has to exert focusing effort. Some researchers feel that fatigue caused by excessive focusing can lead to changes within the eye that cause myopia. And experts agree that focusing on images on a computer screen causes greater eye fatigue than reading normal print in a book or magazine.
To reduce the risk of focusing fatigue that can cause advancing nearsightedness among kids who spend a lot of time on a computer, many eye doctors recommend frequent breaks from computer work. Some call this the "20-20-10" rule: Every 20 minutes your child should take his eyes off the computer and look at an object at least 20 feet away for at least 10 seconds.
This simple exercise relaxes the focusing muscle inside the eye and may help reduce eye strain and eye fatigue that could cause progressive myopia. Some eye doctors also recommend special computer glasses to help relieve eye strain.
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