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This question already has an answer here:

The title says it all, what makes eye defects so common in the world? Whereas defects of any other body part is quite uncommon, I searched online and one of the articles said that 6 out of 10 people wear glasses, I think that is a big percentage of people with eye defects, BTW I'm myopic and I wear glasses too. Are all body parts defective to a certain degree, but It seems more pronounced in the case of eyes?

P.S

I know nothing about biology, I appreciate if someone could explain it with preferably less technical terms, this is my first question on BSE, let me know how I can make the post better.

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marked as duplicate by rg255, MattDMo, Community Feb 1 '16 at 3:07

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • $\begingroup$ @Roland I think that answers my question, you can mark this as a duplicate $\endgroup$ – Oswald Jan 31 '16 at 16:21