/ Dictionary / Index A asthenopia: Meaning and Definition of Find definitions for: as•the•no•pi•a Pronunciation: (as"thu-nō'pē-u), [key] — n. Ophthalm. a fatigue or tiring of the eyes, usually characterized by discomfort, dimness of vision, and headache, caused by overuse of the visual organs, dysfunction of the ocular muscles, and incorrect refraction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: asthenopia (Thesaurus) asthenic asthenosphere Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language