Question: What is the function of the iris?

Answer Choices:
A. Controls light entering
B. Focuses lens
C. Nourishes retina

Answer: A

Question: If left eye is patched, which part of right eye’s field is affected?

Answer Choices:
A. Medial
B. Lateral
C. Superior

Answer: A

Question: What is the pupillary response in concussion if one pupil doesn’t react?

Answer Choices:
A. Abnormal — test for concussion
B. Normal
C. Ignore

Answer: A

Question: Which cranial nerve is responsible for eye’s lateral movement?

Answer Choices:
A. Oculomotor
B. Trochlear
C. Abducens

Answer: B

Question: Why do pupils constrict when focusing on a nearby object?

Answer Choices:
A. Less light needed
B. Avoid blur
C. Better focus on retina

Answer: C

Question: What holds retina against choroid?

Answer Choices:
A. Optic nerve pressure
B. Iris tension
C. Vitreous humor

Answer: C

Question: What photoreceptor is involved in color blindness?

Answer Choices:
A. Rods
B. Ganglion cells
C. Cones

Answer: C

Question: Why is astigmatism axis tested before power?

Answer Choices:
A. Easier to detect blurry lines first
B. Power is less important
C. Vision can be corrected faster

Answer: B

Question: Why does the black dot vanish on yellow background during blind spot test?

Answer Choices:
A. Brain ignores it
B. Yellow cancels black
C. Brain fills in info from surrounding

Answer: C

Question: Match diopters with vision types and lenses

Answer Choices:
0 → Normal (Emmetropia)
-1.25 → Myopia (nearsightedness) → Concave
+2.00 → Hyperopia (farsightedness) → Convex

Answer: As matched above