Two weeks ago, I had the opportunity to speak to two ophthalmologists who made me see things clearly... I was amazed to know from them that the errors of refraction (*technically, the bending of light) in the eyes is not caused by external circumstances but results from the physical development of the eyes. When eyes do not form as it should, the eyes will not bend light correctly resulting in a blurred image.
Common errors of refractions usually called farsightedness, nearsightedness, and astigmatism is dependent on the structure of the eyes. It means watching television or too much time in the computer will not cause one to become farsighted or nearsighted or cause an increase the grade of your eyes or have astigmatism. Astigmatism, for instance, results from a cornea that formed like a "football" and not "basketball-shaped" as normal eyes should be.
Kids, because they are still growing, will tend to be farsighted (able to see things clearly at a distance but unable to focus clearly on near objects) since their eyeballs are small and light entering the eye focuses behind the retina instead of directly on it. But as they grow up, their eyes elongates, and usually most kids outgrow farsightedness...It is best, though, to take your kids to an eye specialist before reaching 7 years old when the eye is still developing as many eye disorders are still reversible up to this age. Eye glasses serve to correct errors of refraction, to help one see clearly. They act as a tool like a cane to the elderly. You remove the cane or the glasses, and you cannot see or walk properly.
I don't really have a point, I just wanted to clarify things to my self :) I know, nerd-attack.
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