Bill Nye - Eyeballs Flashcard

Front

What is the iris of the eye?

Back

The iris is the colored part of the eye that controls the size of the pupil and the amount of light that enters.

Front

Can the eye adapt to any amount of light?

Back

No, the eye cannot adapt to extreme amounts of light; it has limits.

Front

Why do we need images from both eyes?

Back

We need images from both eyes to see in three dimensions, which helps us judge distances.

Front

What did Bill Nye wear at the beginning of the episode?

Back

Bill Nye wore glasses with eyes on springs.

Front

Why is the lens of the eye clear?

Back

The lens of the eye is clear so that light can pass through it to focus images on the retina.

Front

What is the function of the pupil?

Back

The pupil is the opening in the center of the iris that allows light to enter the eye.

Front

What is the retina?

Back

The retina is the layer at the back of the eye that detects light and sends signals to the brain.

Front

What role does the cornea play in vision?

Back

The cornea is the clear front layer of the eye that helps focus light.

Front

What happens to the pupil in bright light?

Back

In bright light, the pupil constricts (gets smaller) to reduce the amount of light entering the eye.

Front

What is depth perception?

Back

Depth perception is the ability to see the world in three dimensions and judge distances.