The Eye Exploring Medical Language Chapter 12

Anatomy Located in the orbit –Bony protective cavity Iris – colored & muscular Pupil – opening in the iris –Dilates and constricts Lens –Focuses and bends light –Located behind pupil

Anatomy Aqueous humor – watery fluid in anterior cavity of the eye Vitreous humor – jellylike substance that gives shape to the eye Lacrimal ducts – drains tears Optic nerve – carries visual impulses to the brain

Word Parts ocul/o………………..eye ophthalm/o…………eye cry/o…………………cold dipl/o…………………two, double ton/o…………………tension, pressure bi-, bin-……………...two -plegia……………….paralysis

Disease & Disorder Terms Blepharoptosis –drooping of the eyelid –ptosis (common name) Conjunctivitis –pinkeye –caused by bacteria or virus –spread by contact with secretions

Disease & Disorder Terms Diplopia –double vision Photophobia –abnormal fear of or sensitivity to light

Disease & Disorder Terms Cataract –clouding of the lens –like vasoline on glasses Detached retina –emergency situation –separation of retina in back of eye

Disease & Disorder Terms Glaucoma –abnormal increase of intraocular pressure –damages optic nerve –can lead to blindness Hyperopia –farsightedness –have trouble seeing up close

Disease & Disorder Terms Myopia –nearsightedness Nyctalopia –poor vision at night

Disease & Disorder Terms Nystagmus –Involuntary, jerking eye movements Presbyopia –Impaired vision as a result of aging

Disease & Disorder Terms Strabismus –Abnormal squinting or crossed eyes Sty –Infection of an oil gland of the eyelid

Surgical Terms Enucleation –Surgical removal of the eyeball

Diagnostic Terms Opthalmoscope –Instrument used for visual examination Tonometry –Measurement of pressure within the eye

Complementary Terms Intraocular –Pertaining to within the eye Intraocular lens

Complementary Terms Lacrimal Pertaining to tears or tear ducts

Complementary Terms Opththalmologist –Doctor who studies and treats diseases of the eye Optic –Pertaining to vision

Complementary Terms Optician –Specialist who fills prescriptions for lenses –Cannot prescribe Optometrist –Professional who prescribes corrective lenses

Complementary Terms Visual acuity –Sharpness of vision Common test

Abbreviations OD –Right eye OS –Left eye OU –Each eye; both eyes