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41 Cards in this Set
- Front
- Back
Eyelids or palpebrae
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thin skeletal muscles covered by folds of skin. Continuation of the skin; thier continual blinking keeps the surface of the eye lubricated and clean from debris.
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Superior levator palpebra
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muscled that moves upper eyelid.
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palpebral conjunctiva
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covers the inner surface of the eyelids
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ocular conjunctiva
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covers anterior surface of the eye and extends over the cornea.
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lacrimal apparatus
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produces, distributes, and removes tears. consists of a lacrimal gland, paired lacrimal canliculi, lacrimal sac, and nasolacrimal duct.
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lacrimal gland
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Superior and Inferior. Secrete tears.
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Lacrimal ducts
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Passageways for tears.
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Lacrim
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tear
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Tear
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Produced by the lacrima gland and used to cleanse and moisten the eye.
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Lacrimal punctum
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Opening for tear drainage. Two small pores.
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Lacrimal sac
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Nestles within the lacrimal sulcus of the orbit.
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Nasolacrimal duct
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passes through the nasolacrimal canal; delivers tears to nasal cavity.
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Medial caruncle
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Region were excess tears are collected. Very vascular soft red tissue.
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Superior, Inferior, medial, and lateral rectus muscles
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Straight muscles that move the eyeball up and down and side to side.
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Superior and inferior Obliques
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Muscles attached diagonally on the eyeball.
Inferior oblique is the shortest of the 6 muscles and rolls the eye upward. |
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Trochlea
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Pulley; rolls the eyeball downward
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BlindSpot/Optic Disc
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Posterior of the eye where blood vessels and nerves enter and leave the interior of the eye. circular region just medial of the fovea.
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central Fovea
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Site of sharpest vision. contains only cones(cell type, color vision).
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Choroid
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Middle layer. Vascular layer that sepreates the fibrous and neural tunics posterior to the ora serrata. Contains an extensive network of capillarys that delivers oxygen and nutrients to the retina; also contains melanocytes.
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Retinal blood vessels
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Blood vessels associated with the retina
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Choroid layer
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Full of blood vessels
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ciliary body
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thickened region that begins deep to the junction between the cornea and the sclera.
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ciliary muscles
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smooth muscular ring that projects into the interior of the eye. smooth muscle fibers
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cornea
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most interior portion, delicate, transparent. Covering over the iris and pupil, avascular.
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Fibrous tunic
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outermost layer of the eye, consists of the sclera and cornea. Provides mechanical support and some physical protection, serves as an attachment site for extrinsic eye muscles, and contains structures that assist in the focusing process.
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Iris
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Most anterior part, a thin muscular diaphragm to regulate the amount of light that enters the pupil.
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Macula lutea
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Contains no rods; yellow spot.
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Pupil
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Central opening of the iris. Light passes through here.
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Retina
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Full of speciliazed cells. Filled with rods & cones. Innermost layer of the eye.
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Sclera/sclera coat
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outermost layer; avascular; white of the eye; tough, white portion of the eye. Clear coat that covers the ocular surface.
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suspensory ligaments
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holds the lens posterior to the iris and centered on the pupil. extend from the ciliary muscles to the lens.
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Vascular tunic
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Middle layer. Contains many blood vessels, lymphatic vessels, and the intrinsic muscles of the eye. secretes and reabsorbs the aqueous humor, controls shape of the lens, regulates amount of light the enters the eye.
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Anterior cavity
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two divisions; anterior and posterior chamber. Filled with fluid called aqueous humor.
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Anterior chamber
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divison of the anterior cavity.
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Aqueous humor
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Fluid that fills that anterior cavity.
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Canal of schlemn / scleral venous sinus
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Opening that always the aqueous humor to drain.
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ciliary process
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continuously secretes the aqueous humor
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lens
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Lies posterior to the cornea. Primary function is to focus the visual image on the photoreceptors(does so by changing shape). Consists of concentric layers of cells. Dense fibrous capsule covers the entire lens.
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Posterior Chamber
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Division of the Anterior Cavity. Filled with the aqueous humor.
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Posterior Cavity.
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Filled with a Gelatinous substance known as the vitreous humor or body.
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Vitreous body or Vitreous Humor
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Gelatnous mass. Helps stabilize the shape of the eye.
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