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What is a blind spot? Why do we have one?

1 doctor weighed in
Dr. Tim Conrad
Ophthalmology

In brief: 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.

In brief: 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.
Dr. Tim Conrad
Dr. Tim Conrad
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