A medical condition of the eyes where the two eyes perceive images of different sizes, causing vision problems and discomfort.
From Greek 'anis-' (unequal) + 'eikon' (image) + '-ia' (condition). Coined in the early 20th century by eye specialists to describe this specific binocular vision disorder.
Aniseikonia is one of those hidden eye problems—one eye sees bigger than the other, which confuses your brain so much it can cause headaches, and it took modern optometry to even name it!
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