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A member asked:
What is a blind spot? why do we have one?
A doctor has provided 1 answer
BS: The physiologic blind spot is the area about 12 degrees temporal to center of vision. It corresponds to the location of the optic nerve head. There is no light sensitive tissue on the ONH. You can find your blind spot by closing one eye, looking at your thumb at arm's length, and slowly moving your arm away from your body while staring straight ahead. Your thumb will disappear.
Answered 1/12/2015
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