Test 31
1. VEP (visual evoked potential) is indicated in the following conditions:
a. Best's disease

b. malingering

c. albinism

d. subclinical multiple sclerosis

e. visual acuity in pre-verbal children


2. The following are true about colour vision:
a. blue cone responds to wavelength of 580nm

b. green cone responds to wavelength of 550nm

c. red cone responds to wavelength of 450nm

d. deutanopia refers to problem with blue colour

e. protanopia refers to problem with green colour


3. Amsler's grid:

a. should be read at 60cm

b. when used at the correct distance each square 
    subtend one degree of arc on the retina

c. of the most commonly used type contains 360 
    small squares

d. of the most commonly used type contains
    small squares each measuring 5 X 5 mm

e. is useful for self-monitoring in patients at risk
    of retinal detachment


4. Features of a patient being fitted with too flat a contact lens

a. blurred vision with blinking

b. decreased contact lens movement

c. central corneal abrasion

d. high lens position

e. difficulty in removing contact lens

5. As the correct axis is approached during retinoscopy, the
    following changes are seen in retinoscopy:

a. brighter intensity

b. fatter reflex

c. less break

d. less skew

e. scissoring reflex 

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