Sickle-shaped extension of blind spot is known as
Seidel's scotoma: With the passage of time paracentral scotoma joins the blind spot to form a sickle shaped scotoma known as Seidel's scotoma. Ref:-A K KHURANA; pg num:-219
Down's sign
Bjerrum's sign
Seidel's sign
Baring of blind spot
Glaucoma