Sickle scotoma

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sickle scotoma --> Bjerrum's scotoma

A comet-shaped scotoma, occurring in glaucoma, attached at the temporal end to the blind spot or separated from it by a narrow gap; the defect widens as it extends above and nasally curves around the fixation spot, and then extends downward to end exactly at the nasal horizontal meridian.

Synonym: bjerrum's sign, sickle scotoma.