What is responsible for the lack of photoreceptors at the optic disc and consequent blind spot?
A) It is the location where blood vessels and ganglion cell axons leave the eye.
B) It is a location with a high density of pigment obscuring photoreceptor cells.
C) It is the location where parts of the two optic nerves cross the midline.
D) It is point of attachment for eye muscles.

Question

Quizplus · Accepted Answer

The optic disc is the location where blood vessels and ganglion cell axons exit the eye, therefore there are no photoreceptors present at this location, resulting in a blind spot.

What Is Responsible for the Lack of Photoreceptors at the Optic