Exam (elaborations)
HTHSCI 1H06A: Sensory Aspects of Vision Questions and Answers
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HTHSCI 1H06A: Sensory Aspects of Vision Questions and Answers
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1-103 of 103Where does the cornea have epithelial layer?
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Anterior and posterior surfaces
What is refractive power?
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air/water interface on the cornea accounts for 80% of refraction
Where does the superior colliculus project info to? (6)
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-cerebellum to make coordinated movements
-nucleus about light intensity
-CNIII to control pupillary constriction
-pontine tegmental reticular formation to contribute to alertness
-inferior olivary nucleus to maintain head position and level horizon
-region of hypothalamus that allows for dilation
What are the cranial nerves associated with sensory aspects of vision? (2)
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II (optic) and V (trigeminal)
How many cranial nerves innervate the eye or its associated structures?
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6 of 13
, What could result from hypertrophy of the gland?
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May compress axons of crossing ganglia cells from the nasal retina of each
eye, resulting in blindness (bitemporal hemianopia)
What happens to lens fibres with age?
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They stiffen and the lens becomes frozen in the far-sighted position
(presbyopia)
What does a cholinergic agonist do?
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Constricts pupil
What does the retina around the fovea absorb? (yellow pigment)
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Blue light (macula lutea)
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