Understanding How Our Eyes Work

What is the function of the cornea?

• The cornea produces tears to keep the eye moist.
• The cornea is responsible for color vision.
• The cornea regulates the pressure inside the eye.
• The cornea refracts light and protects the eye.

What is the pupil?

• The pupil is the opening in the center of the iris that regulates light entry into the eye.
• The pupil is a muscle that controls eye movement.
• The pupil is the colored part of the eye.
• The pupil is a type of lens in the eye.

What does the iris do?

• The iris controls the amount of light entering the eye.
• The iris helps in focusing images on the retina.
• The iris is responsible for color perception.
• The iris protects the eye from foreign objects.

What does the retina do?

• The retina produces tears to keep the eye moist.
• The retina focuses light onto the lens.
• The retina protects the eye from harmful rays.
• The retina converts light into electrical signals for vision.

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How many times does an average person blink in a minute?

• 15 to 20 times
• 50 to 60 times
• 30 to 40 times
• 5 to 10 times

What happens to the lens when an object is closer to the eye?

• The lens becomes flatter and less curved.
• The lens remains unchanged regardless of distance.
• The lens becomes thicker and more curved.
• The lens becomes opaque and loses its clarity.