M9.2 Human Eye Anatomy and Function

What is the primary function of the cornea in the human eye?

• To control the amount of light entering the eye

• To focus light by bending incoming rays

• To change the shape for focusing

• To detect light and color

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

• Cornea

• Retina

• Iris

• Lens

What is the function of ciliary muscles in the eye?

• To detect light

• To change the shape of the lens

• To control pupil size

• To produce tears

What is the dark area at the center of the iris called?

• Cornea

• Retina

• Pupil

• Lens

Where is the image typically focused in the retina?

• Optic nerve

• Fovea

• Peripheral vision

• Blind spot

Which chart is often used to assess visual acuity?

• Ishihara chart

• Snellen chart

• Rorschach chart

• Bar chart

How can 20/20 vision be expressed in meters?

• 6/6 vision

• 5/5 vision

• 10/10 vision

• 4/4 vision

Where is the image formed in myopia?

• Behind the retina

• In front of the retina

• On the retina

• On the cornea

What is a symptom of astigmatism?

• Blurred vision

• Double vision

• Distorted visual perception

• Night blindness

What is the primary function of the cornea and lens in vision?

• To produce tears

• To focus light on the retina

• To detect color

• To protect the eye from dust