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32 Cards in this Set
- Front
- Back
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eyelids (definition/description) |
anterior protectors of the eyes |
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medial and lateral commissure (definition/description) |
the corners of the eye where the eyelids meet |
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palpebral fissure (definition/description) |
space between the eyelids in an open eye |
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tarsal glands (definition/description) |
modified sebaceous glands associated with the eyelid edges, producing oil to lubricate the eye |
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conjunctiva (definition/description) |
delicate membrane lining the eyelids and covers part of the outer surface of the eyeball and secretes mucus for lubrication |
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lacrimal apparatus (definition/description) |
lacrimal gland and a number of ducts draining the lacrimal secretions into the nasal cavity |
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lacrimal glands (definition/description) |
make tears and are located above the lateral end of each eye |
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lysozyme (definition/description) |
an enzyme that destroys bacteria |
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extrinsic eye muscles (definition/description) |
6 muscles that produce gross eye movements and make it possible for eyes to follow a moving object |
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fibrous layer (definition/description) |
outermost eyeball layer containing sclera and cornea |
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sclera (definition/description) |
thick, white tissue of eye used for protection |
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cornea (definition/description) |
central anterior portion of fibrous layer that is crystal clear through which light enters the eye; easily transplanted because it is avascular |
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vascular layer(definition/description) |
middle layer of the eyeball |
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choroid (definition/description) |
blood-rich nutritive tunic containing a dark pigment and preventing light from scattering in the eye |
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ciliary body (definition/description) |
attached to the lens by the ciliary zonule (suspensory ligament) |
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pupil (definition/description) |
iris's rounded opening, regulating amount of light entering eye |
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iris (definition/description) |
pigmented, colored part of eye |
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sensory layer (definition/description) |
innermost layer of the eye |
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retina (definition/description) |
two-layered part of the sensory layer of the eye, extended anteriorly to the ciliary body |
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fovea centralis (definition/description) |
latteral to blind spot; pit that contains only cones; area of greatest visual acuity |
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lens (definition/description) |
flexible, biconvex crystal-like structure focusing the light on the retina |
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aqueous humor (definition/description) |
clear, watery fluid anterior to the lens |
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vitreous humor (definition/description) |
gel-like substance posterior to the lens |
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scleral venous sinus (definition/description) |
way through which the aqueous humor is reabsorbed into the venous blood |
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refracted (definition/description) |
light passes from one substance to another with a different density, changing its speed and bending its rays |
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accommodation (definition/description) |
ability for eye to focus specifically on close objects |
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real image (definition/description) |
image fromed on retina as a result of refraction |
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convergence (definition/description) |
reflexive movement fo the eyes medially when viewing close objects |
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photopupillary reflex (definition/description) |
when eyes are suddenly exposed to bright light, pupils immediately constrict |
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accommodation pupillary reflex (definition/description) |
constrict reflexively when viewing close objects |
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fundus (definition/description) |
posterior wall of the eye |
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opthalmoscope (definition/description) |
instrument illuminating the interior of the eyeball, allowing retina, optic disc, and internal blood vessels to be viewed and examined |
