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What is the function of the adipose tissue in the orbit of the eye?
Supports and surrounds the eyeball, protects and cushions
Why does one have to blow one's nose after crying?
Tears drain into the nasal cavity through the nasolacrimal duct
The iris is composed of two smooth muscle layers, one arranged radially and the other circularly. Which of these dilates the pupil?
The radial layer
Modification of the choroid that controls the shape of the crystalline lens and contains the ciliary muscle
What modification of the choroid that is not present in humans is found in the cow eye? What is its function?
Tapetum Lucidum, reflects light that enters the eye, helps with night vision
What does the retina look like? At what point is it attached to the posterior aspect of the eyeball?
White membrane, the optic disc
Normal vision in the left eye visual field; absence of vision in the right eye visual field
Damage to the right optic nerve
Normal vision in both eyes for right half of the visual field; absence of vision in both eyes for the left half of the visual field
Damage to the right optic tract
How is the right optic tract anatomically different from the right optic nerve?
Right optic tract contains fibers from the lateral part of the right eye and the medial part of the left eye, right optic nerve only has fibers from the right eye
The "near point" increases with age because the _______ of the lens decreases as we get older
A convex lens, like that of the eye, produces an image that is upside down and reversed from left to right. Such an image is called a _____ image
During distance vision, the ciliary muscle is _____, the suspensory ligament is _______, the convexity of the lens is _________, and light refraction is ___________
Relaxed, taut, decreased and decreased
During close vision, the ciliary muscle is ________, the suspensory ligament is ________, lens convexity is __________, and light refraction is ___________
Contracted, relaxed, increased and increased
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