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a combining form occurring in compound words denoting a condition of sight or of the visual organs: diplopia; hemeralopia; myopia.
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Also -opsia.

Origin of -opia

<Greek -ōpia, akin to ōpḗ view, look, ṓps eye, face
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022


What does -opia mean?

The combining form -opia is used like a suffix denoting visual disorders. It is often used in medical terms, especially in ophthalmology.

The combining form -opia comes from the Greek ṓps, meaning “eye” or “face.” The Greek ṓps is also at the root of the word cyclops, a mythical giant with a single large eye. Cyclops literally means “round-eye” in Greek.

What are variants of –opia?

Occasionally, -opsia is used as a variant of -opia, as in teleopsia. Another rare variant of -opia is -opy.

Speaking of ophthalmology, this “eyeful” of a word uses ophthalmo-, a combining form from the Greek ophthalmós, which is ultimately related ṓps, source of -opia.

Examples of -opia

The combining form -opia is used to name various visual disorders. One such condition is polyopia, “the perception of several visual images of one object, multiple vision.”

The first part of the word, poly-, means “much, many.” As we know, -opia refers to sight and seeing. Polyopia has a literal sense of “seeing many visions.”

What are some words that use the combining form –opia?

What are some other forms that -opia may be commonly confused with?

Break it down!

The combining form phot- means “light.” With this in mind, what is photopia?

How to use -opia in a sentence

British Dictionary definitions for -opia


n combining form
indicating a visual defect or conditionmyopia

Derived forms of -opia

-opic, adj combining form

Word Origin for -opia

from Greek, from ōps eye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for -opia


A visual condition or defect of a specified kind:anisometropia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.