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Respiration Physiology and Vision Practical Quiz

18 Questions

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Respiration Physiology and Vision Practical Quiz

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Questions and Answers

What happens to the pupils of both eyes when one eye is exposed to light?

Constriction of both pupils (correct)

Dilation of both pupils

Dilation of one pupil and constriction of the other

No change in pupil size

What is the term for the reflex constriction of the pupil of the same eye exposed to light?

Direct reflex (correct)

Consensual reflex

Indirect reflex

Pupillary reflex

What is the purpose of holding a torch away from the line of vision during the pupillary light reflex test?

To test the subject's peripheral vision

To test the subject's reaction time

To avoid stimulating the pupil prematurely (correct)

To ensure the subject is not distracted

What is observed in a normal pupillary light reflex test?

Constriction of both pupils Signup and view all the answers

Why is the pupillary light reflex test performed?

To assess the depth of anesthesia Signup and view all the answers

What is the nerve responsible for transmitting the signal for pupillary constriction?

Facial nerve Signup and view all the answers

What is the purpose of miosis in the accommodation reflex?

To avoid spherical and chromatic aberration, increase depth of focus, and bring the image on fovea centralis Signup and view all the answers

What is observed in the pupil size during near vision with convergence of both eyes?

The pupils constrict Signup and view all the answers

What is the minimum retinal distance required for visual acuity?

3  Signup and view all the answers

What is the purpose of the Landolt broken circle chart?

To measure the visual acuity of the eye Signup and view all the answers

What is the minimum visual angle required for visual acuity?

Less than 1 minute Signup and view all the answers

What is the purpose of accommodation in the accommodation reflex?

To increase the dioptric power of the lens and focus near objects on the retina Signup and view all the answers

What is the purpose of standing 6 meters from the chart during a visual acuity test?

To avoid accommodation Signup and view all the answers

What is the formula used to determine visual acuity?

V=d/D Signup and view all the answers

What is the purpose of Weber's test?

To compare bone conduction in both ears Signup and view all the answers

What is the sequence of tests used if a patient is unable to see at 1 meter?

Counting fingers, hand movement, perception of light Signup and view all the answers

What is the distance at which the largest letter on the Snellen's chart is visible to the normal eye?

60 meters Signup and view all the answers

What is the result of a visual acuity test if a patient can see marks up to the 18-meter level only?

6/18 Signup and view all the answers