The function of the iris is to ....

Which cranial nerve innervates the lateral rectus muscle of the eye?

The human eye is most sensitive to light of wavelength:

Select the correct option:
$(1)$ There are no photoreceptor cells slightly above the posterior pole of the eyeball,hence it is called the blind spot.
$(2)$ Rod cells contain a purple-red protein called rhodopsin.

What is the approximate number of cones in each human eye?

How many eye muscles are present which control all types of eye movement?