Question

Fovea centralis is region of
A) Choroid with only cone cells
B) Retina with only rod cells
C) Retina without any sensory cells
D) Retina with only cone cells

Answer 1

Hint: The fovea centralis is a small, central pit composed of closely packed cones in the eye. It is located in the centre of the macula lutea of the retina. It has a high amount of cone cells which detect information through receptors on the surface.

Complete Answer:
Let us know about the fovea centralis, its location and its functions-
1) The fovea centralis, also generally known as the fovea (the term fovea comes from the Latin, meaning pit or pitfall), is a part of the eye, located in the center of the macula region of the retina. It is responsible for sharp central vision (also called foveal vision), which is necessary in humans for reading, driving, and any activity where visual detail is of primary importance.
2) It is surrounded by the parafovea belt, and the perifovea outer region. The parafoveal belt is a region in the retina that circumscribes the fovea and is part of the macula lutea. It is circumscribed by the perifovea.
Now, we will know about the choroid belt-
The choroid or the choroid belt is the vascular layer of the eye, containing connective tissues, and lying between the retina and the sclera.
Whereas, the rod cells are concentrated at the outer edges of the retina but not in the fovea.The rod cells are used in peripheral vision. Here this information travels through nerves from the sensory cells to the brain.
As we see from the discussion the fovea centralis is located in the centre of the macula lutea of the retina and possesses the cone cells.

Hence, the correct answer is option D (Retina with only cone cells).

Note: The fovea is responsible for sharp central vision which is necessary in humans forreading, driving, and any activity where visual detail is of primary importance.