A condition where the two eyes have different visual acuity or sharpness of vision, with one eye seeing more clearly than the other.
From Greek 'anisos' (unequal) + 'opia' (vision condition). Medical ophthalmologists coined this term in the 1800s-1900s.
Your eyes might literally see the world at different 'resolutions'—one eye might see sharp details while the other sees fuzzy, which is why your brain sometimes struggles to merge the images properly.
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