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14 Cards in this Set

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accommodation
process whereby the lens changes shape to see objects at various distances
aqueous humor
fluid in the eye that bathes the anterior region
conjunctiva
membrane that lines the eyyelid and covers the anterior of the eye
convergence
simultaneous inward movement of both eyes (towards each other)in order to produce a single binocular vision of an object; The tending of two or more objects toward a common point.
The direction of the visual lines to a near point.
crystalline lens
adjusts the thickness and shape of the lens (refraction)
emmetropia
normal vision
Fovea centralis
area of sharpest vision
Lacrimal ducts
tear ducts
Macula lutea
yellow spot in the center of the retina that contains the fovea centralis
optic disk
blind spot -- region where optic nerve meets the retina
optic nerve
nerve carrying impulses -- traveling to and from the brain; The nerve carrying impulses for the sense of sight.
refraction
bending of light rays (focusing)
visual acuity
sharpness of vision tested with a Snellen chart (rows of letters to be read from top to bottom - with gradual decrease in the size of lettering)
Vitreous chamber
cavity behind the lens containing vitreous fluid -- maintains shape of eyeball