Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A condition in which the refractive power of one eye differs from that of the other.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A condition in which the two eyes of an individual have different refractive power.

from the GNU version of the Collaborative International Dictionary of English

  • n. Unequal refractive power in the two eyes.

from The Century Dictionary and Cyclopedia

  • n. Inequality of the eyes with respect to refractive power.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. difference in the refractive power of the two eyes

Etymologies

aniso- + Greek metron, measure; see meter1 + -opia.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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