: unequal refractive power in the two eyes

Word History

Etymology

New Latin, from Greek anisometros of unequal measure (from anis- + metron measure) + New Latin -opia — more at measure

First Known Use

1865, in the meaning defined above

Time Traveler
The first known use of anisometropia was in 1865

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Cite this Entry

“Anisometropia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/anisometropia. Accessed 8 Jul. 2026.

Medical Definition

anisometropia

noun
: unequal refractive power in the two eyes
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