orthokeratology

[awr-thoh-ker-uh-tol-uh-jee]

or·tho·ker·a·tol·o·gy

[awr-thoh-ker-uh-tol-uh-jee]
noun Ophthalmology.
a technique for correcting refractive errors in vision by changing the shape of the cornea with the temporary use of progressively flatter hard contact lenses.

Origin:
1970–75; ortho- + kerato- + -logy
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Orthokeratology has a plethora of syllables.
So is dichlorodiphenyltrichloroethane. Does it mean:
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
American Heritage
Medical Dictionary

orthokeratology or·tho·ker·a·tol·o·gy (ôr'thō-kěr'ə-tŏl'ə-jē)
n.
A method of improving unaided vision by molding the cornea with contact lenses.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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