The optic disc is the
A) area of highest visual acuity in the retina.
B) area of the retina through which the axons of the ganglion cells exit.
C) area of the retina with the highest concentration of rods.
D) round opening of the eye through which light enters.

Question

Quizplus · Accepted Answer

The optic disc is the area of the retina through which the axons of the ganglion cells exit to form the optic nerve. It is also known as the "blind spot" because there are no photoreceptor cells in this area, making it insensitive to light. Option A is incorrect because the area of highest visual acuity is the fovea, which is located away from the optic disc. Option C is incorrect because the highest concentration of rods is in the peripheral retina, away from the optic disc. Option D is incorrect because the round opening of the eye through which light enters is the pupil.

The Optic Disc Is the