CS/B.OPTM/SEM-4/BO-401/2013
2013
VISUAL OPTICS ( OPTICS – IV )
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following : 10 × 1 = 10
i) Pelli Robson chart is used for
a) V. A. testing
b) Glare testing
c) Contrast sensitivity testing
d) Colour vision testing.
ii) 1 mm shortening of axial length of eyeball can produce
a) 1D of hyperopia b) 3D of hyperopia
c) 1D of myopia d) 3D of myopia.
iii) If a myopic patient shifts from spectacle to contact lens
a) accommodative & vergence demand increase
b) accommodative & vergence demand decrease
c) accommodative demand increases but vergence
demand decreases
d) no change occurs in accommodative & vergence
demand.
iv) Spherical equivalent of +2·00/–2·50 D cyl 90° is
a) + 3·25 Dsph b) – 0·50 Dsph
c) + 0·75 Dsph d) + 0·50 Dsph.