What is "asthenopia"

Asthenopia \As`the*no"pi*a\, n. [Gr. 'a priv. + sqe`nos strength + 'w`ps eye.] Weakness of sight.
--Quain. -- As`the*nop"ic, a.

n. An ophthalmological condition that manifests itself through nonspecific symptoms such as fatigue, red eyes, eye strain, pain in or around the eyes, blurred vision, headache and occasional double vision.

n. a tiredness of the eyes caused by prolonged close work by a person with an uncorrected vision problem [syn: eyestrain]