Test 30  (ocular physiology)
1. With regard to the cornea:
a. photokeratitis occurs with wavelength of 270nm

b. microvilli are found in the outer layer of the epithelium

c. the turnover of the corneal epithelium typically takes 30 days

d. the corneal epithelium is about 10 layers in thickness

e. the corneal nerves do not contain schwann cells

2. True statements about the aqueous include:

a. the production is about 2 ul/min

b. the endothelium contribute to the production of aqueous

c. its production decreases with age

d. it has the same osmolarity as the plasma

e. the uveoscleral outflow is an active process

3. The following conditions can affect the pupil size:

a. iris colour

b. fatigue

c. exercise

d. refractive error

e. axial length of the eyeball

4. In Argyll-Robertson's pupils:

a. the pupils are irregular

b. iris atrophy are common

c. there are absent tendon reflexes

d. the lesion is in the mid-brain

e. the pupils react poorly to atropine

5. The following are true about the pupils:

a. pupil size is largest in adolescence

b. physiological anisocoria is found in 20% of the population

c. the latent period of the pupil reaction to light ranges from 
    0.2 to 0.5s

d. afferent pupil defect is present in complete third nerve palsy

e. efferent pupil defect is present in Adie's pupil


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