asthenopia

(as-then-o'pK-ah) [G. asthenes, weak, + dps, eye.] Weak sight, eyestrain, acconun'odative a., eyestrain, a. due to errors of refraction and the consequent strain on the ciliary muscle. mus'cular a., a. due to imbalance of the extrinsic ocular muscles, ner'vous a., a., due to functional or organic nervous disease, neurasthen'ic a., a. occurring in nervous subjects who may be emmetropes or whose am metro pia has been corrected by gla es, ret'inal a., neurasthenic a. tar's al a., a. due to abnormal pre ure of the eyelids on the globe of the eye.