This Darkly Pigmented Structure Reduces Light Reflection Within the Eyeball

Question

This darkly pigmented structure reduces light reflection within the eyeball.
A) sclera
B) conjunctiva
C) iris
D) choroid
E) retina

Accepted Answer

The choroid is a darkly pigmented layer of the eye that contains blood vessels and reduces light reflection within the eyeball, helping to prevent scattering of light and improve visual acuity.