Question

Which one is not true of a normal retina?

A. A central small pet called the optic disc is the visual location for the best color, shape, and movement discrimination.

B. It is richly supplied with blood vessels.

C. It has a blind spot.

D. It contains millions of photo receptor cells, but no chemo receptor cells.

Answer 1

A. A central small pet called the optic disc is the visual location for the best color, shape, and movement discrimination.

Step-by-step explanation:

The optic disc, also known as the optic nerve head, is not a "pet" and it is not a location for visual discrimination. It is a small, circular area at the center of the retina where the optic nerve and blood vessels enter and exit the eye. The optic disc does not contain any photo receptors, so it is a "blind spot" in the sense that it does not contribute to vision. However, the rest of the retina is richly supplied with photo receptors and is responsible for sensing light and providing visual information to the brain.