Which part of the eye contains billions of molecules of vitamin A?

Question

Quizplus · Accepted Answer

The retina contains the photoreceptor cells that detect light and send signals to the brain, and these cells contain pigments called rhodopsin and photopsin that consist of a protein and a molecule of vitamin A. The vitamin A molecule is essential for the function of these pigments in detecting light, and billions of these molecules are found in the retina. The cornea is the clear outer layer of the eye that helps to focus light onto the retina, but it does not contain vitamin A. The sclera is the white part of the eye that provides structure and protection, but it also does not contain vitamin A. The macula is a specialized area of the retina that is responsible for central vision, but it contains the same pigments as the rest of the retina and does not have a higher concentration of vitamin A. The choroid is a layer of tissue behind the retina that provides blood flow and nutrients to the retina, but it also does not contain vitamin A.

Which Part of the Eye Contains Billions of Molecules of Vitamin