the eye exam questions accompanied
with fullrevised answers
If the eye then focuses on the words in a book, changes would occur in the eye. The light rays would be
refracted more by the lens. How does the lens refract the light more?(1) - Correct Answer: -by becoming
thicker
Which two structures control the shape of the lens?(2) - Correct Answer: -ciliary muscles
-suspensory ligaments
To form a clear image, the light rays entering the eye must focus on one structure in the eye. Name the
structure.(1) - Correct Answer: -retina
Name the common defect of the eye which causes distant objects to appear out of focus.(1) - Correct
Answer: -short-sightedness
Describe how the brain receives information about light entering the eye.(3) - Correct Answer: -(cells in)
retina sensitive to light
-impulse passes along (sensory) neurone
-(along) optic nerve
Explain how the person's eye could adjust to form a clear image of a nearer object.(6) - Correct Answer:
-ciliary muscles contract
- (so ciliary muscles have a) smaller diameter
-(so) suspensory ligaments loosen / slacken
-lens thickens or lens becomes more curved / rounded
-lens is more convergent
-lens is more convergent
Explain why a long-sighted person has difficulty seeing near objects clearly.(2) - Correct Answer: -eye(-
ball) is (too) short or lens cannot be thickened enough
with fullrevised answers
If the eye then focuses on the words in a book, changes would occur in the eye. The light rays would be
refracted more by the lens. How does the lens refract the light more?(1) - Correct Answer: -by becoming
thicker
Which two structures control the shape of the lens?(2) - Correct Answer: -ciliary muscles
-suspensory ligaments
To form a clear image, the light rays entering the eye must focus on one structure in the eye. Name the
structure.(1) - Correct Answer: -retina
Name the common defect of the eye which causes distant objects to appear out of focus.(1) - Correct
Answer: -short-sightedness
Describe how the brain receives information about light entering the eye.(3) - Correct Answer: -(cells in)
retina sensitive to light
-impulse passes along (sensory) neurone
-(along) optic nerve
Explain how the person's eye could adjust to form a clear image of a nearer object.(6) - Correct Answer:
-ciliary muscles contract
- (so ciliary muscles have a) smaller diameter
-(so) suspensory ligaments loosen / slacken
-lens thickens or lens becomes more curved / rounded
-lens is more convergent
-lens is more convergent
Explain why a long-sighted person has difficulty seeing near objects clearly.(2) - Correct Answer: -eye(-
ball) is (too) short or lens cannot be thickened enough
