Which of the Following is a Function of the Pigmented

Question

Which of the following is a function of the pigmented layer of the retina?
A) provide eye color
B) house the photoreceptors
C) secrete vitreous humor
D) absorb light passing through the neural layer
E) refract light onto the photoreceptors

Accepted Answer

The pigmented layer of the retina absorbs light passing through the neural layer, preventing that light from reflecting back and producing visual "echoes" or glare. It also helps to nourish the photoreceptor cells in the neural layer. Eye color is determined by the amount and distribution of pigments in the iris, not the pigmented layer of the retina. The photoreceptors are housed in the neural layer, not the pigmented layer. The vitreous humor is produced by the ciliary body, not the pigmented layer. Refraction of light onto the photoreceptors is primarily the function of the cornea and lens.