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Transcript
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