ANATOMY

GENERAL ANATOMY

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The sharpest vision occurs in the region of teh retina called the:
A
optic disc
B
fovea centralis
C
vitreous humor
D
sclera
Explanation: 

Detailed explanation-1: -The fovea centralis is located in the center of the macula lutea, a small, flat spot located exactly in the center of the posterior portion of the retina. As the fovea is responsible for high-acuity vision it is densely saturated with cone photoreceptors.

Detailed explanation-2: -The fovea allows for our sharpest vision primarily due to the fact that it is packed with cones, which are a photoreceptor that specialize in light reception at high intensity levels. The density of cones results in a high density in neural fibers leading to the optic nerve and to the visual centers of the brain.

Detailed explanation-3: -The fovea eye pit does not have any rods or other neurons, only millions of tightly packed cones. By grouping en masse, cones get optimal exposure to soak up light as it comes into the eye, allowing them to create the sharpest possible image.

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