A) is the colored part of the eye
B) produces tears
C) is the mucous covering of the eye
D) is the clear part of the sclera in the front of the eye

A) helps focus light on the rear of the eye
B) produces tears
C) prevents the scattering of incoming light rays
D) is the white of the eye

A) proprioceptor
B) mechanoreceptor
C) thermoreceptor
D) photoreceptor