: reduced vision typically in one eye that results from the brain suppressing input from the affected eye due to unequal visual signals from each eye (as from strabismus or anisometropia) leading to poor development of visual acuity in the affected eye
Sometimes the misalignment produces double vision. In such cases the brain's solution is to suppress the input from one eye. Eventually this input will wither, and the vision from that eye will become permanently poor—a condition called amblyopia Margaret S. Livingstone et al.

called also lazy eye

Examples of amblyopia in a Sentence

Recent Examples on the Web
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One of the primary reasons early detection is vital is because the window of opportunity to treat amblyopia effectively narrows as a child grows older. Letters To The Editor, Orlando Sentinel, 4 Aug. 2024 Untreated hyperopia can lead to the development of a lazy eye (amblyopia) or additional vision loss. Kelly Burch, Verywell Health, 11 July 2024

Word History

Etymology

New Latin, from Greek amblyōpia, from amblys blunt, dull + -ōpia -opia — more at mollify

First Known Use

circa 1587, in the meaning defined above

Time Traveler
The first known use of amblyopia was circa 1587

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Cite this Entry

“Amblyopia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amblyopia. Accessed 21 Apr. 2025.

Kids Definition

: reduced vision in one eye that results from poor development of the part of the brain which serves the affected eye

called also lazy eye

Medical Definition

: reduced vision typically in one eye that results from the brain suppressing input from the affected eye due to unequal visual signals from each eye (as from strabismus or anisometropia) leading to poor development of visual acuity in the affected eye
Sometimes the misalignment produces double vision. In such cases the brain's solution is to suppress the input from one eye. Eventually this input will wither, and the vision from that eye will become permanently poor—a condition called amblyopia Margaret S. Livingstone et al.

called also lazy eye, lazy-eye blindness

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