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For other uses, see Blind pass (disambiguation). Blind Pass is the strait that separates Captiva Island from Sanibel Island in Lee County, Florida. Blind Pass from Sanibel Island looking towards Captiva Island with Blind Pass Bridge at left. Archived copy. Archived from the original on 2008-09-17.
The natural blind spot occurs where axons passing over the front of the retina converge to form the head of the optic nerve, and where retinal blood vessels enter and exit the eyeball, resulting in a hole in the photoreceptor mosaic.