Rarely astheny. Path. [mod L., a. Gr. ἀσθένεια, f. ἀσθεν-ς weak, f. ἀ priv. + σθένος strength.] Lack of strength, diminution of vital power, weakness, debility. Asthenology, scientific consideration of diseases arising from debility (Mayne, Exp. Lex., 1853). Asthenopia [Gr. ὤψ, ὦπα eye], weakness of sight.
1830. Edin. Encycl., XIV. 10. Asthenia including those diseases which consist in a diminution of the nervous energy.
1859. Worcester, Astheny.
1862. Bellew, Afghan., 390. The typhus character was proved by the extreme asthenia.
1875. H. Walton, Dis. Eye, 345. Asthenopia quickly occurs.
