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Blind spot (vision)
Additional recommended knowledge
Although all vertebrates have this blind spot, cephalopod eyes, which are only superficially similar, do not. In them, the optic nerve approaches the receptors from behind, so it does not create a break in the retina.
The first documented observation of the phenomenon was in the 1660s by Edme Mariotte in France, at a time when it was generally thought that the point at which the optic nerve entered the eye should actually be the most sensitive portion of the retina .
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Blind_spot_(vision)". A list of authors is available in Wikipedia.|