Question

a spot in the middle of the retina that only contains cones is called the _______
a. cornea
b. optic nerve
c. fovea
d. optic disk

please select the best answer from the choices provided

a
b
c
d

Explanation:

Identify the anatomical structure described

The question asks for the name of the spot in the middle of the retina that contains only cones.

Evaluate the given options

• A. cornea: The transparent outer layer at the front of the eye that helps focus light.
• B. optic nerve: The nerve that transmits visual information from the retina to the brain.
• C. fovea: A small depression in the central retina (macula) where visual acuity is highest, containing a high concentration of only cone photoreceptors.
• D. optic disk: The point of exit for ganglion cell axons leaving the eye (the blind spot), containing no photoreceptors.

Select the correct option

The fovea is the central focal point on the retina, packed exclusively with cones, making option C the correct choice.

Answer:

• A. cornea
• B. optic nerve
• C. fovea (Correct answer)
• D. optic disk