A:-reduced sensitivity of peripheral retina
B:-Peripheral rays cut off by iris to counteract optical aberrations
C:-greater sensitivity of retinal photoreceptors to perpendicular rays rather than oblique rays
D:-higher refractive index of core of lens nucleus than peripheral cortex
Correct Answer:- Option-C
Question10:-All the following statements regarding aqueous humour are true except
A:-The glucose content is approximately 80% of that of plasma
-The lactate concentration is twice that of plasma
C:-Aqueous has relatively low ascorbic acid content
D:-Active secretion accounts for the major fraction in aqueous secretion
Correct Answer:- Option-C
Question11:-Regarding extra ocular movements - identify the false statement
A:-The primary action of inferior oblique is excyclotorsion
B:-The right inferior oblique & Left superior rectus are yoked muscles
C:-The primary action of superior oblique muscle is incyclotorsion
D:-The Right medial rectus & Left lateral rectus are antagonistic muscles
Correct Answer:- Option-D
Question12:-The following charts are used in the testing of contrast sensitivity except
A:-Vistech chart
B:-Cambridge gratings
C:-Rosenbaums chart
D:-Regan charts
Correct Answer:- Option-C
Question13:-In fourth nerve palsy
A:-Hyperdeviation increases on contralateral head tilt
B:-Microvascular occlusion is the most common cause
C:-Vertical fusion range more that 3D suggests congenital palsy
D:-Excyclotorsion less than 10 degrees suggest bilateral involvement
Correct Answer:- Option-C
Question14:-In Electrophysiology, which of the following statement is true
A:-The EOG originates in the photoreceptors
B:-The a wave of ERG originates in muller cells
C:-Pattern ERG is a measure of ganglion cell function
D:-100% is an abnormal Arden ratio
Correct Answer:-Question Cancelled
Question15:-The Enhanced depth imaging modality in OCT is primarily useful in studying
A:-Inner retinal layers
B:-Outer retinal layers
C:-Choroid
D:-Middle retinal layers
Correct Answer:- Option-C
Question16:-All of the following are true regarding the lacrimal drainage system except
A:-Positive Jones dye test implies physiological functioning of the system
B:-soft stop is characteristic of canalicular obstruction
C:-In lacrimal pump failure, Jones dye test is negative
D:-lipiodal is the agent used in scintillography
Correct Answer:- Option-D
Question17:-Regarding Anisocoria,
A:-Increased anisocoria in dim light implies abnormality of the smaller pupil
B:-vermiform movements of pupil is seen in Horner's syndrome
C:-Physiological anisocoria is seen in 10% of population
D:-In longstanding Adie's pupil, the pupil appears to be larger in size
Correct Answer:- Option-A
Question18:-CT vesus MRI, All of the following are true except
A:-CT has faster image acquisition time
B:-CT shows artefacts from dental amalgam & bone
C:-MRI can display images in any anatomical plane
D:-In MRI, bright signal within vessel indicates blood flow
Correct Answer:- Option-D