I beleive studies have shown that *for children* lots of close work (e.g. reading) may cause a existing inherited tendency to short-sightedness to manifest.
The
American Optometric Association says
Quote:
There is significant evidence that many people inherit nearsightedness, or at least the tendency to develop nearsightedness. If one or both parents are nearsighted, there is an increased chance their children will be nearsighted.
Even though the tendency to develop nearsightedness may be inherited, its actual development may be affected by how a person uses his or her eyes. Individuals who spend considerable time reading, working at a computer, or doing other intense close visual work may be more likely to develop nearsightedness.
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