twitch in the eyelid
conjunctiva (to join together)
ciliary body (circle)
iris (colored circle)
ocul/o, opthalm/o, opt/o
condition of vision
fluid filled space between the cornea and iris
watery liquid secreted at the ciliary body that fills the anterior and posterior chambers of the eye and provides nourishment for the cornea, iris, and lens (humor=fluid)
canal of Schlemm
duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream
epithelial tissue folds on the inner surface of the ciliary body that secretes aqueous humor
joining together' mucous membrane that lines the eyelids and outer surface of the eyeball
transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image
movable protective fold that opens and closes, covering the eye
pinpoint depression in the center of the macula lutea that is the site of sharpest vision
interior surface of the eyeball including the retina, optic disk, macula, and posterior pole (curvature at the back of the eye).
glands of Zeis
oil glands surrounding the eyelashes
oil glands located along the rim of the eyelids
colored circle; colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil
gland located in the upper outer region above the eyeball that secretes tears
tubes that carry tears to the lacrimal sac
structure that collects tears before emptying into the nasolacrimal duct
transparent structure behind the pupil that bends and focuses light rays on the retina
capsule that encloses the lens
macula lutea (macula)
central region of the retina responsible for central vision; yellow pigment provides its color
black circular opening in the center of the iris through which light passes as it enters the eye
different size pupils
two pupils in a single eye
innermost layer that perceives and transmits light to the optic nerve
cone shaped cells within the retina that are color sensitive and respond to bright light
rod-shaped cells within the retina that respond to dim light
enhanced vision at night
bad vision at night, night blindness
tough, fibrous, white outer coat extending from the cornea to the optic nerve
jelly-like mass filling the inner chamber between the lens and retina that gives bulk to the eye
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