Visual sensations from images focused on the side of the retina are blurred because
A)there are no rods in this region.
B)there are more cones than rods in this region.
C)there are more rods than cones in this region.
D)the optic disc is located on the side of the retina.

Question

Quizplus · Accepted Answer

Rods are responsible for peripheral vision and are more concentrated on the outer edges of the retina, while cones are responsible for central vision and are more concentrated in the fovea, which is on the center of the retina. Therefore, the side of the retina has more rods than cones, which leads to blurred vision when visual sensations are focused on that area. The optic disc, which is where the optic nerve exits the retina, is located on the nasal side of the retina and does not play a role in blurring the visual sensations on the temporal side.

Visual Sensations from Images Focused on the Side of the Retina