Ophthalmology Anatomy d2c026ee Size of optic disc is? A 0.5 mm B 1.5 mm C 5.5 mm D 10.5 mm High-Yield Explanation Ans. (b) 1.5 mmRef.: Kanski 7thed chapter 10, Glaucoma: Science and Practice By John Morrison, Irvin Pollack p. 91