A medical eye condition where the eyes do not align properly, causing them to look in different directions simultaneously (also called strabismus).
From Greek 'hetero-' (different) and 'tropia' (turning), a medical term from the 1800s describing misaligned eye movement.
Heterotropia is why some people appear cross-eyed or wall-eyed—their eye muscles developed with different 'turning preferences,' and it can often be corrected with special glasses or surgery.
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