MCQ
Blind spot is called so because of
- Athe presence of photoreceptor cells.
- Bthe absence of optic nerves.
- Cthe absence of photoreceptor cells.
- Dthe presence of optic nerves.
✓
Answer
C. the absence of photoreceptor cells.
Explanation:
The optic nerves leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eyeball. Photoreceptor cells are not present in that region and hence it is called the blind spot. At the posterior pole of the eye, lateral to the blind spot there is a yellowish pigmented spot called macula lutea with a central pit called the fovea.
Explanation:
The optic nerves leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eyeball. Photoreceptor cells are not present in that region and hence it is called the blind spot. At the posterior pole of the eye, lateral to the blind spot there is a yellowish pigmented spot called macula lutea with a central pit called the fovea.
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