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Why is there a blind spot in the human eye?
AThere are no receptors where the optic nerve meets the eye
BThe lens blocks all light from reaching that one spot
CThe cornea is thinnest at that particular location
DThe pupil never opens wide enough to illuminate that spot
Answer & Solution
Correct answer: A. There are no receptors where the optic nerve meets the eye
1. There are no light receptors at the place where the optic nerve meets the eye.
2. That receptor-free location is called the blind spot, and an image falling there cannot be seen.
3. The lens, cornea and pupil are not described as the cause of this particular gap in the visual field.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.3 Lenses_
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