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20 Cards in this Set
- Front
- Back
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FOVEA
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Small depression in the center of the macula
Area of greatest visual acuity Lies directly opposite the pupil |
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CILIARY BODY
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Extension of choroid layer
Posterior to iris Has muscles that change shape of lens Produces aqueous humor Contains ligaments that keep lens in place behind iris |
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RETINA
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Membrane lining the posterior cavity
Contains rods and cones Includes optic disk and macula |
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OPTIC DISK
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Bright yellow-white circle on the retina where optic nerve and retinal arteries enter posterior cavity
Cannot perceive visual images Known as the blind spot |
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OPTIC NERVE
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Cranial Nerve II
A sensory nerve that carries nerve impulses of visual images from the rods and cones of the retina to the visual cortex of the brain Enters the eye at the optic disk |
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MACULA
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Dark yellow-orange area with indistinct eges in the retina
Contains the fovea |
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SCLERA
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White, tough, fibrous connective tissue that forms the outer layer around most of the eye
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LACRIMAL SAC
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Small structure that collects tears as they drain from the medial aspect of the eye
Empties into the nasolacrimal duct |
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LENS CAPSULE
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Clear membrane that envelopes the lens
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CONJUNCTIVA
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Delicate, transparent mucuos membraine that covers the inside of the eyelids and the anterior surface of the eye
Produces clear, watery mucus |
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LACRIMAL GLAND
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Produces and releases tears through the lacrimal ducts
Located near the superior lateral aspect of the eye |
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TRABECULAR MESHWORK
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Area of interlacing fibers through which aqueous humor is filtered
Located in the anterior chamber in the angle where the edges of cornea and iris meet |
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AQUEOUS HUMOR
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Clear watery fluid produced by ciliary body
Circulates through posterior and anterior chambers Takes nutrients and oxygen to the cornea and lens |
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SEBACEOUS (MEIBOMIAN) GLANDS
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Oil glands at the edges of the eyelids
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NASOLACRIMAL DUCT
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Tube that carries tears from the lacrimal sac to the inside of the nose
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ORBIT
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Bony socket in the cranium that surrounds all but the anterior part of the eyeball
Eye socket |
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OPTIC GLOBE
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The eyeball
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SUPERIOR RECTUS MUSCLE
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Turns the eye superiorly
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INFERIOR RECTUS MUSCLE
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Turns the eye inferiorly
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MEDIAL RECTUS MUSCLE
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Turns the eye medially
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