What is the value of diurnal variation of IOP above which diagnosis can be made as Glaucoma: (A) 5 mm of Hg, (B) 6 mm of Hg, (C) 8 mm of Hg, (D) 10 mm of Hg
Answer is C. Difference of IOP of eye between Morning and night  >8 mm of Hg is diagnostic Glaucoma.