Seidel's sign (also called Seidel's scotoma) is a sickle-shaped scotoma that is a superior or inferior extension of the blind spot.

It occurs in some patients with glaucoma.

[1] In 1914, German ophthalmologist Erich Seidel first described the glaucomatous visual field defect, Seidel's scotoma.

[2] This medical sign article is a stub.

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