When red light and green light are mixed together and viewed by the human eye, what color is perceived?

Why is the optic disc of the eye called a blind spot?

Nearsightedness, or myopia, is a refractive error of the eye that makes it difficult to focus on:

If a person gets a visual acuity rating of 20/20 that means his visual acuity is:

What structure in the eye anatomy is referred to in the following illustration?

The specialized photoreceptors in the eyes that respond better to low light are known as:

The part of the eye where only cones can be found: