A medical condition involving loss or absence of vision in all or part of the visual field; blindness or defective sight.
From Greek 'an-' (without) + 'opia' (vision, seeing), related to 'ops' (eye). Medical term from the 19th century describing various forms of vision loss.
Hemianopia, a type of anopia where half the visual field is blind, reveals something amazing—patients often don't notice the missing vision because their brain predicts what should be there, filling in the gap unconsciously.
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