• WordNet 3.6
    • n asthenopia a tiredness of the eyes caused by prolonged close work by a person with an uncorrected vision problem
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Webster's Revised Unabridged Dictionary
    • n Asthenopia Weakness of sight.
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Century Dictionary and Cyclopedia
    • n asthenopia Weakness of the eyes. Two forms are especially important: accommodative asthenopia, which is the result of the exhaustion of the ciliary muscle, as in hypermetropia; and muscular asthenopia, which is the result of some exhaustion of the external muscles of the eye, usually the internal rectus.
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Webster's Revised Unabridged Dictionary
Gr. 'a priv. + sqe`nos strength + 'w`ps eye


In literature:

Then came an increasing asthenopia, with evening headaches, until her temper changed and became capricious and irritable.
"Fat and Blood" by S. Weir Mitchell
Muscular asthenopia undoubtedly occurs; it is only a question whether it is as frequent as it is diagnosed.
"Schweigger on Squint" by C. Schweigger