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Seeing and Hearing
Veterinary Medical Terminology Chapter 14
| Question | Answer |
|---|---|
| focusing | refraction; the process of the lens bending the light rays to help tem focus on the retina |
| accommodation | process of eye adjustments for seeing objects at various distances; accomplished through changes in lens shape |
| acuity | sharpness or acuteness, usually used in reference to vision |
| convergence | simultaneous inward movement of both eyes; |
| fove/o | pit |
| lute/o | yellow |
| macul/o | spot |
| retin/o | retina |
| retina | the nervous tissue layer of the eye that receives images and lines the posterior chamber of the eye |
| optic disk | region of the eye where nerve endings of the retina gather to form the optic nerve; also called the blind spot |
| vitreous humor | soft, clear, jellylike mass that fills the vitreous chamber |
| aqueous humor | anterior and posterior chambers of the eye are filled with this watery fluid |
| mydriasis | pupillary dilation |
| lens | clear, flexible, avascular, curved capsule located posterior to the iris and pupil |
| miosis | pupillary constriction |
| pupil | circular opening in the center of the iris |
| core/o and pupill/o | pupil |
| phac/o | lens of the eye |
| intraocular pressure; IOP | test used to determine the resistance of the eyeball to indentation by an applied force |
| anis/o | unequal |
| tonometry | procedure using an instrument to measure intraocular pressure indirectly |
| pupillary light reflex; PLR | response of pupil to light |
| palpebral reflex | diagnostic test in which the eye should blink in response to touch at the medial canthus of the eye |
| menace response | diagnostic test to detect vision in which movement is made toward the animal to test whether it will se movement and try to close it eyelids |
| ophthalmoscope | instrument used for ophthalmoscopy |
| OD | right eye |
| OS | left eye |
| OU | both eyes |
| AD | right ear |
| AS | left ear |
| AU | both ears |
| periocular | around the eyeball |
| palpebral | pertaining to the eyelid |
| blephar/o | eyelid |
| extrins/o | contained outside |
| blephar/o | eyelid |
| canthus | the angle where the upper and lower eyelids meet |
| tars/o | edge of the eyelid |
| Meibomian gland | sebaceous glands on the margins of each eyelid |
| cilia | eyelashes |
| conjuctiva | mucous membrane that lines the underside of each eyelid |
| nictitating membrane | conjuctival fold attached at the medial canthus that moves across the cornea when the eyelids close; third eyelid |
| lacrim/o and dacry/o | teardrop, tear duct, or lacrimal duct |
| orb | eyeball |
| sclera | fibrous outer layer of the eye that maintains the shape of the eye;white of the eye |
| cornea | anterior portion of thesclera that is transparent |
| corne/o and kerat/o | cornea |
| opaque | light cannot pass through |
| iris | pigmented muscular diaphragm of the choroid that surrounds the pupil |
| orbit | bony cavity of the skull that contains the eyeball |
| opt/i, opt/o, optic/o, ocul/o, and ophthalm/o | eye or eye sight |
| adnexa | accessory structures of an organ |
| cataract | cloudines or opacity of thelens |
| distichiasis | abnormal condition of a double row of eyelashes |
| cherry eye | nictitating gland prolapse |
| stye | hordeolum |
| epiphora | excessive tear production |
| -tropia | turning |
| eso- | inward |
| exo- | outward |
| audit/o, aud/i, ot/o | ear |
| acoust/o and acous/o | sound or hearing |
| auricle | pinna |
| pinn/i | external ear |
| aur/o and aur/i | external ear |
| cerumen | earwax |
| eardrum | tympanic membrane |
| tympanic membrane | tissue that separates the external ear from the middle ear/ sound waves reach the tympanic membrane then transmits sounds to the ossicles |
| tympan/o and myring/o | eardrum |
| malleus | hammer |
| incus | anvil |
| stapes | stirrup |
| auditory ossicles | three little bones of the middle ear that transmit sound vibrations |
| otoscope | instrument used to examine ears |
| aural hematoma | collection or mass of blood on the outer ear |
| aural | pertaining to the ear |
| ear pain | |
| AD | right ear |
| AS | left ear |
| AU | both ears |
| OD | right eye |
| OS | left eye |
| OU | both eyes |
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