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MED203 Ch 5
Eye & Ear flashcards
| Term | Definition |
|---|---|
| Cornea | Clear coating over the center of the eye |
| Conjunctiva | Covering over the sclera |
| Rods | responsible for black/white vision |
| Rods | located at the periphery of the retina |
| Rods | responsible for vision in dim light |
| Cones | located in the center of the retina |
| Cones | responsible for color vision |
| Sclera | White part of the eye |
| Iris | Colored part of the eye |
| Conjunctivitis | Pink eye |
| Retinal detachment | Sudden, painless vision loss |
| Vitreous body (chamber) | Largest aspect of the eye |
| Optic disc | Where optic nerve inserts into the retina; blind spot |
| Hyperopia | Farsightedness (person can see far away objects) |
| Myopia | Nearsightedness (person can see close up) |
| Astigmatism | blurred vision from abnormal curvature of cornea (light falls unevenly on retina) |
| Presbyopia | Changes in eyesight that result from aging (eye loses accommodation) |
| Nystagmus | Involuntary, repetitive eye movements |
| Strabismus | failure of the eye to look in the same direction (cross-eyed is an example) |
| Amblydopia | Lazy eye |
| Blepharitis | Inflammation/infection of the eyelid |
| Ectropion | Outward protrusion of the lower lid |
| Entropion | Inward inversion of the lower lid |
| Hordoleum | large stye of the eye |
| Chalazion | smaller stye of the eye often found at the eyelash border |
| Cataract | cloudy opacity of the lens |
| Glaucoma | Increased intraoccular pressure which can result in blindness |
| Macular degeneration | Progressive deterioration of the retina resulting in loss of central vision |
| Diabetic retinopathy | results from neovascularization |
| Ocular melanoma | What is the most common ocular tumor in an adult? |
| Retinoblastoma | What is the most common ocular malignancy in children? |
| Cerumen impaction/obstruction | Conductive disorder where wax blocks the auditory canal |
| Otitis media | Infection of the middle ear which can result in decreased conduction |
| Otitis externa | Infection of the auditory canal which can result in decreased conduction. |
| Otosclerosis | hardening of the ossicles of the ear which can result in decreased conduction |
| Ossicles | Bones of the middle ear are collectively called: |
| Acoustic neuroma | benign tumor around the 8th cranial nerve |
| Cholesteatoma | Cyst of infected skin cells within middle ear that erodes the cavity and ossicles |
| Labyrinthitis | Inflammation in the semicircular canals of the inner ear |
| BPPV | benign paroxsymal positional vertigo - benign dizziness |
| Ménière's Disease | chronic inner ear disorder involving vertigo, tinnitus and hearing loss |
Created by:
DrGreimel
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