d) iris is the correct answer.
The size of the pupil of the eye is adjusted by:
a) cornea
b) ciliary muscles
c) optic nerve
d) iris
a) cornea
b) ciliary muscles
c) optic nerve
d) iris
The size of the pupil of the eye is adjusted by:
a) cornea
b) ciliary muscles
c) optic nerve
d) iris
a) cornea
b) ciliary muscles
c) optic nerve
d) iris