Sickle-shaped extension of blind spot is known as: (A) Down's sign, (B) Bjerrum's sign, (C) Seidel's sign, (D) Baring of blind spot
Answer is C. 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