High-acuity vision is mediated by the
A) optic disk.
B) blind spot.
C) fovea.
D) choroid.
E) sclera.

Question

Quizplus · Accepted Answer

High-acuity vision, which refers to detailed and sharp vision, is mostly mediated by the fovea. The fovea is a small, central area of the retina that is densely packed with photoreceptor cells and is responsible for high-resolution vision. The optic disk is the point where the optic nerve exits the eye, and it lacks photoreceptor cells, so it is not involved in high-acuity vision. The blind spot is the area where the optic nerve exits, and it lacks photoreceptor cells, so it cannot help with high-acuity vision. The choroid is part of the vascular layer of the eye and is not involved in vision. The sclera is the tough outer layer of the eye that helps maintain the shape of the eyeball, but it does not play a direct role in vision.

High-Acuity Vision Is Mediated by the