How the Eye Works
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Objective
I understand the functions of the eye
Part 1 of 3
Key concepts
3 concepts
- 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.
Part 2 of 3
Practice
3 questions
Describe the primary role of the cornea in the process of vision.
Which structure is responsible for regulating the amount of light that enters the eye?
Part 3 of 3
Exit ticket
Quick comprehension check
“Describe the primary function of the cornea, iris, and retina as explained in the reading passage.”
Sample answer included in the free materials
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Teacher Guide
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