| Seidel sign | |
|---|---|
 | |
| A visual description of the sites of different types of scotomas on the retina.Seidels sign is marked with orange | |
| Differential diagnosis | glaucoma |
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]