How the Eye Works
Adult · Science · 30 min
Lesson Preview
Learning Objective
I understand the functions of the eye
- 1
Light first enters the eye through the cornea, which provides most of the eye's focusing power, and the iris controls the amount of light by adjusting the pupil.
- 2
The lens fine-tunes the focus for objects at varying distances, and light rays then project onto the retina, a light-sensitive tissue lining the back of the eye.
- 3
The retina contains rods for detecting light and dark, and cones for perceiving color and fine detail, which convert light into electrical signals sent to the brain via the optic nerve.
