human eye

What is the approximate diameter of the human eye?

• 2.5 centimeters
• 1 centimeter
• 3 centimeters
• 5 centimeters

What role does the cornea play in the process of vision?

• It transmits visual information to the brain.
• It is responsible for color vision.
• It focuses light onto the retina.
• It regulates the size of the pupil.

Which part of the eye changes size in response to light levels?

• Retina
• Pupil
• Lens
• Cornea

Which structure of the eye is responsible for controlling the amount of light that enters?

• Lens
• Cornea
• Iris
• Retina

What is the primary function of the lens in the eye?

• To focus light onto the retina.
• To control the size of the pupil.
• To detect low light levels.
• To transmit signals to the brain.

Which part of the eye contains photoreceptor cells?

• Cornea
• Iris
• Lens
• Retina

What is the primary function of rods in the retina?

• To focus light onto the retina.
• To provide peripheral and night vision.
• To detect color in bright light.
• To regulate the size of the pupil.

What is the main difference between rods and cones in the retina?

• Rods control pupil size; cones focus light.
• Rods detect color; cones detect light levels.
• Rods are located in the cornea; cones are in the lens.
• Rods function in low light; cones function in bright light.

What condition occurs when the eyeball is too long or the cornea is too curved?

• Presbyopia
• Myopia (Nearsightedness)
• Astigmatism
• Hyperopia (Farsightedness)

What condition occurs when the eyeball is too short or the cornea is too flat?

• Presbyopia
• Astigmatism
• Hyperopia (Farsightedness)
• Myopia (Nearsightedness)