This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Embryology& Anatomy, Subject name: Ophthalmology
Father of ophthalmology? 
Select and explain. 
A. William Osler, B. Sushruta, C. Albrecht Von Graefe, D. David James
C: Albrecht Von Graefe
Answer: C: Albrecht Von Graefe 
Explanation: Father of Ophthalmology = Albrecht Von Graefe Von Graefe sign= lid lag sign in hypehyroidism Pseudo Von Graefe sign= seen in abberant 3rd nerve regeneration