Question 1

What is the human eye?

Accepted Answer

The human eye is like a camera that helps us see. It takes in light and turns it into images.

Question 2

What is the white part of the eye called?

Accepted Answer

The white part of the eye is called the sclera. It's tough and protects the inside parts of the eye.

Question 3

What does the iris do?

Accepted Answer

The iris is the colored part of your eye, like blue or brown. It controls how much light goes into your eye by making the pupil bigger or smaller.

Question 4

What is the black circle in the middle of the eye?

Accepted Answer

The black circle in the middle is called the pupil. It's like a little window that lets light enter the eye.

Question 5

What is behind the pupil?

Accepted Answer

Behind the pupil is the lens. The lens helps focus light onto the back of the eye so we can see clearly.

Question 6

What is the retina?

Accepted Answer

The retina is a thin layer at the back of the eye that catches the light coming in. It changes light signals into messages that go to the brain.

Question 7

How does the eye help us see colors?

Accepted Answer

The eye has special cells in the retina called cones that let us see colors. These cells help us tell the difference between reds, blues, greens, and every color in between.

Question 8

Why do we blink?

Accepted Answer

We blink to keep our eyes clean and moist. Blinking spreads tears across the surface, which keeps out dust and dirt.

Question 9

What are tears for?

Accepted Answer

Tears keep our eyes from getting dry and help wash away tiny things like dust. They also protect our eyes from infections.

Question 10

What is the purpose of eyelashes?

Accepted Answer

Eyelashes help keep dirt and tiny particles from getting into our eyes. They also help shade the eyes from sunlight.

Question 11

How do glasses help people see better?

Accepted Answer

Glasses help focus light correctly onto the retina. If someone can't see well, glasses can make images clearer.

Question 12

Why do people have different eye colors?

Accepted Answer

Eye color depends on the amount of a pigment called melanin in the iris. More melanin means darker eyes, and less means lighter eyes.

Question 13

What is the cornea?

Accepted Answer

The cornea is the clear, front part of the eye that helps focus light. It's like a window that shields the eye from dust and germs.

Question 14

What does '20/20 vision' mean?

Accepted Answer

Having 20/20 vision means you can see things clearly at 20 feet that most people can see at 20 feet. It's often considered perfect vision.

Question 15

What part of the eye sees the most detail?

Accepted Answer

The part of the retina called the macula sees the most detail. It's responsible for our sharp central vision, like reading or watching TV.

Question 16

What causes red-eye in photos?

Accepted Answer

Red-eye happens when light from a camera flash reflects off the back of the eye, where there are lots of blood vessels. It makes the eyes look red in pictures.

Question 17

What are floaters?

Accepted Answer

Floaters are tiny specks or clouds that drift around in your field of vision. They're usually bits of protein in the eye and are mostly harmless.

Question 18

What does the optic nerve do?

Accepted Answer

The optic nerve carries messages from the retina to the brain. It helps the brain understand what the eyes are seeing.

Question 19

Why do we have two eyes?

Accepted Answer

Having two eyes helps us see in 3D and judge how far away things are. It also gives us a wider field of view.

Question 20

How do eyes work with the brain?

Accepted Answer

The eyes send images to the brain through the optic nerve. The brain then turns these images into the pictures we see.

The Anatomy of the Human Eye - 20 FAQs Explained Simply