Eye Anatomy Quiz: Test Your Knowledge of Eye Structures

What is the first structure that light hits as it leaves the television?

What is the function of the cornea in vision?

What is the cornea also involved in, besides vision?

What is the structure that controls the amount of light entering the eye?

What is the structure that is involved in focusing light?

If someone pokes your eye gently away from the cornea, what can you do?

What is the structure that is behind the cornea?

What happens when someone pokes your cornea?

What is the function of the iris?

What is the black hole in the middle of the iris?

What happens to the pupil when there is a lot of light entering the eye?

What is the function of the lens?

What allows the lens to focus on objects near and far away?

What would happen if you didn't have a lens?

What is the shape of the lens when it focuses on objects close to the eye?

Structures at the Front of Your Eye

Light from the TV travels through the air to reach several major structures in the front of the eye, including the cornea, iris, pupil, lens, and ciliary muscles.
These structures work together to help us see and interpret light entering the eye.

The Cornea

The cornea is the outermost layer of the eye, a transparent layer that covers the iris and pupil.
It bends light as it enters the eye and is involved in sensing pain.
The cornea has many nerves, making it very sensitive to scratches, which can be very painful.

The Iris and Pupil

The iris is the structure that gives us our eye color and controls the amount of light reaching the back of the eye.
The iris controls the amount of light entering the eye by changing the diameter of the pupil.
The pupil is a hole in the middle of the iris that allows light to enter the eye.
The pupil constricts in bright light and dilates in low light to let more light in.

The Lens and Ciliary Muscles

The lens is a structure behind the iris that focuses light rays entering through the pupil to form an image at the back of the eye.
The lens helps us see things near and far away through the process of accommodation.
The ciliary muscles contract to shape the lens into a ball for focusing on close objects, and relax to shape it into a flat disk for focusing on far objects.
Without a lens, we would only be able to see things at a very far distance.

Learn about the crucial structures at the front of your eye that play a vital role in vision. From the cornea to the lens, discover how these structures work together to help you see and interpret light. Take this quiz to test your knowledge of eye anatomy!