We do not see the blood vessels and neurons that lie in front of the retina because
A)the visual system does not respond much to stimuli that never change.
B)these structures are made of special proteins whose fibers make them transparent.
C)they are blocked by the vitreous humor.
D)they lie behind the lens and cornea.

Question

We do not see the blood vessels and neurons that lie in front of the retina because​ 
A)the visual system does not respond much to stimuli that never change. 
B)these structures are made of special proteins whose fibers make them transparent. 
C)they are blocked by the vitreous humor. 
D)they lie behind the lens and cornea.

Quizplus · Accepted Answer

The visual system is adapted to ignore constant stimuli, such as the blood vessels and neurons in front of the retina, making them effectively invisible to us.

We Do Not See the Blood Vessels and Neurons That