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35 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Palpebrae are also known as |
Eyelids |
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A clear mucous membrane that lines the eyelids (palpebral conjunctivae) and lines the anterior white of the eye (bulbar conjunctiva) |
Conjunctiva |
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Prevents bacteria from getting into the brain |
Conjunctiva |
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Includes the lacrimal gland and a series of ducts that drain the lacrimal fluid into the nasal cavity |
Lacrimal apparatus |
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Protect the eyes and spread lacrimal fluid with blinking |
Eyelids |
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Protects the eye by keeping it moist. Blinking spreads the lacrimal fluid |
Lacrimal apparatus |
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Secrete mucus to lubricate the eye. |
Conjunctiva |
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Inflammation of conjunctiva results in |
Conjunctivitis or “pink eye” |
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Secretes lacrimal fluid, which contains fluid, antibodies and lysozyme |
Lacrimal gland |
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Located in the superior and lateral aspect of the orbit of the eye |
Lacrimal gland |
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Order of lacrimal |
Lacrimal puncta->lacrimal canaliculi->lacrimal sac->nasolacrimal duct->nasal cavity |
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Six muscles for each eye;four recti and two oblique muscles |
Extrinsic eye muscles |
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Control the movement of each eyeball and hold the eyes in the orbits |
Extrinsic eye muscles |
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Layers of the eye |
Fibrous layer (external layer) Vascular layer Inner layer (retina) |
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Gives eye muscle something to attach to and is avascular |
Fibrous tunic |
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Forms the white part of the eye |
Sclera |
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Forms a clear window that is the major light bending (refracting) medium of the eye |
Cornea |
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Parts of the fibrous layer (tunic) |
Sclera Cornea |
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Parts of the vascular tunic (uvea) |
Choroid Cilary body Iris Pupil |
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The blood vessels nourish the other layers of the eye and the melanin helps to absorb excess light |
Choroid |
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Contains the ciliary muscle and the ciliary process |
Cilary body |
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Contains smooth muscle suspensory ligaments and lens |
Cilary body |
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Attaches the lens to ciliary process |
Suspensory ligaments |
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Controls the amount of light entering the eye by changing the size of the pupil diameter. The sphincter pupillae contract to constrict the pupil. The dilator pupillae contract to dilate the pupil |
Iris |
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Allows light to enter the eye |
Pupil |
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The iris contains |
Smooth muscle |
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Parts of the retina (sensory tunic) |
Pigmented layer Visual neural layer Macula lures Optic disc |
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Absorbs light and prevents it from scattering in the eye. Pigment cells act as phagocytes for cleaning up cell debris and also store vitamin a needed for photoreceptor renewal |
Pigmented layer |
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Photoreceptors respond to light and convert the light energy into action potentials that travel to the primary visual cortex of the brain |
Visual neural layer |
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Layer closest to the pigmented part of the retina; contains the photoreceptors |
Neural part of the retina |
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Is an opacity of the normally clear lens which may develop as a result of aging metabolic disorders trauma or heredity |
Cataract |
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Clear watery fluid |
Aqueous humor |
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Anterior to the lens which contains fluid called aqueous humor |
Anterior segment |
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Behind the lens filled with a gel like substance called the vitreous humor |
Posterior segment |
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When intraocular pressure reaches dangerously high levels, the retina and optic nerve are compressed, resulting in pain and possible blindness a condition called |
Glaucoma |
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