The eye - anatomical
Terms
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- fluid-filled space between the cornea and iris
- anterior chamber
- 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
- aqueous humor
- humor
- fluid
- duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream
- canal of Schlemm
- vascular layer beneath the sclera that provides nourishment to the outer portion of the retina
- choroid
- ring of muscle behind the peripheral iris that controls the power of the lens
- ciliary body
- smooth muscle portion of the ciliary body, which contracts to assist in near-vision capability
- ciliary muscle
- epithelial tissue folds on the inner surface of the ciliary body that secrete aqueous humor
- ciliary processes
- joining together; mucous membrane that lines the eyelids and outer surface of the eyeball
- conjuctiva
- transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image
- cornea
- movable protective fold that opens and closes, covering the eye
- eyelid (palpebra)
- pinpoint depression in the center of the macula lutea that is the site of sharpest vision
- fovea centralis
- fovea
- pit
- interior surface of the eyeball including the retina, optic disk, macula, and posterior pole (curvature at the back of the eye)
- fundus (base
- oil glands surrounding the eyelashes
- glands of Zeis
- oil glands located along the rim of the eyelids
- meibomian glands
- colored circle; colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil
- iris
- gland located in the upper outer region above the eyeball that secretes tears
- lacrimal gland
- tubes that carry tears to the lacrimal sac
- lacrimal ducts
- structure that collects tears before emptying into the nasolacrimal duct
- lacrimal sac
- transparent structure behind the pupil that bends and focuses light rays on the retina
- lens
- capsule that encloses the lens
- lens capsule
- central region of the retina responsible for central vision; yellow pigment provides its color
- macula lutea (macula)
- lutea
- yellow
- passageway for tears from the lacrimal sac into the nose
- nasolacrimal duct
- exit site of retinal nerve fibers, as well as the entrance point for retinal arteries and the exit point for retinal veins
- optic disk
- nerve responsible for carrying impulses for the sense of sight from the retina of the brain
- optic nerve
- space between the back of the iris and the front of the vitreous filled with aqueous fluid
- posterior chamber
- black circular opening int the center of the iris through which light passes as it enters the eye
- pupil
- innermost layer that perceives and transmits light to the optic nerve
- retina
- cone-shaped cells within the retina that are color sensitive and respond to bright light
- cones
- rod-shaped cells within the retina that respond to dim light
- rods
- tough, fibrous, white outer coat extending from the cornea to the optic nerve
- sclera
- mesh-like structure in the anterior chamber that filters the aqueous humor as it flows into the canal of Schlemm
- trabecular meshwork
- jelly like mass filling the inner chamber between the lens and retina and gives bulk to the eye
- vitreous