Answers

2015-09-04T20:10:18+08:00
They are all congenital defects. And for what i already know, Farsightedness, also hyperopia and nearsightedness or myopia are kinds of Astigmatism. Tunnel vision is also known as blurry vision. Myopia causes things in a distant to be blurry while hyperopia was like your vision is out of focus in nearby objects.

That's all i know...
Hope that would help a little.
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