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PUBLIC MARKS from recommendations with tags problems & problem

June 2008

How do Contact Lenses Work

by 36 others

For those with astigmatism, the problem is a little different. An irregularly shaped cornea characterizes astigmatism. Therefore, the light entering the eye is focused on two separate points within the eye.

contact lenses vision astigmatism wear problem lens objects worn properly place refractive result people person toric hand correction visual presbyopia

February 2007

Graph theory - Wikipedia, the free encyclopedia

graph theory graphs problem edit problems matrix subgraphs structures vertices structure list network data applications vertex study drawing edges induced

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