A:-Diopter
B:-Metre angle
C:-Millimeter
D:-Degrees
Correct Answer:- Option-B
Question69:-Snowflake cataract is seen in
‏8ھ‎
‎B:-Steroid use
C:-Hyperparathyroidism
D:-Diabetes
Correct Answer:- Option-D
Question70:-One predisposing factor for hordeolum extemum
A:-Hypertension
B:-Uncorrected refractive शाण
C:-Ptosis
D:-Proptosis
Correct Answer:- Option-B
Question71:-Vertex power of spectacle lens is measured by
A:-Optical pachymeter
B:-Specular microscope
C:-Hruby lens
D:-Lensometer
Correct Answer:- Option-D
Question72:-All the following are features of Vitamin A deficiency EXCEPT

:-Night blindness
B:-Bitots spots
C:-Phlycten

D:-Keratomalacia
Correct Answer:- Option-C
Question73:-Keratometer is useful for all the following conditions EXCEPT
A:-Measure the radius of curvature of anterior surface of comea
B:-IOL power calculation
C:-Measurement of comeal astigmatic error
D:-Measurement of comeal endothelial cell count
Correct Answer:- Option-D
Question74:-Darkening of lens on exposure to UV rays in photochromic lenses is due to disintegration of
A:-Aluminium phosphate
B:-Silver Halide
C:-Borosilicate
D:-Polycarbonate
Correct Answer:- Option-B
Question75:-Instrument used to assess peripheral retina
A:-90 dioptre lens
B:-Direct ophthalmoscope
C:-Optical coherence tomograph
D:-Indirect ophthalmoscopy
Correct Answer:- Option-D
Question76:-All the following condition can cause coloured haloes EXCEPT
A:-Cataract
B:-Acute namow angle glaucoma
C:-Episcleritis
D:-Mucopurulent conjunctivitis
Correct Answer:- Option-C
Question77:-Instrument used to predict the visual acuity following cataract surgery
A:-Potential acuity meter
B:-Arden gratings
C:-Pelli Robson chart
D:-Vistech chart
Correct Answer:- Option-A