Test 72     (Ocular physiology)
1. During accommodation:
a. the distance between the lens and the ciliary body is 
b. the tension in the suspensory ligament is increased
c. the tension of the lens capsule is increased
d. the refractive power of the lens is increased
e. there is an increased sympathetic outflow to the ciliary

2. True statements about accommodation:

a. it does not occur in the absence of convergence
b. it occurs equally in both eyes
c. the range of accommodation decreases with age
d. the amplitude of accommodation is about 30D at birth
e. it is impaired by phenylephrine

3. The visual acuity is affected by:

a. pupil size
b. illumination of the target
c. red-green colour blindness
d. contrast
e. posterior subcapsular cataract more than anterior 
    subcapsular cataract

4. The following are true about pupillary reaction to light:

a. it is impaired in damage of the Edinger-Westphal 
b. it is impaired in damage of the ciliary ganglion
c. it is impaired in damage of the superior cervical ganglion
d. the pupil does not respond to light with a frequency of 
    greater than 5 Hz
e. the latent period for pupillary reaction to light is shorter 
    than that for accommodation.

5. The following are true:

a. heroin causes miosis by increasing the release of 
b. botulinum toxin causes mydriasis by inhibiting the 
    release of acetylcholine
c. phenylephrine causes mydriasis by stimulating the 
    a receptors
d. amphetamine causes mydriasis by inhibiting 
    noradrenaline reuptake
e. carbachol causes miosis by increasing the release of 
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