This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Development and clinical examination, Subject name: Ophthalmology
Volume of an adult eyeball ls 
Select and explain. 
A. 5.5mL, B. 6.5mL, C. 7.5ml, D. 8mL
B: 6.5mL
Answer: B: 6.5mL 
Explanation: Dimensions of an adult eyeball Anteroposterior diameter 24 mm Horizontal diameter 23.5 mm Veical diameter 23 mm Circumference 75 mm Volume 6.5 ml Weight 7 gm. Image : A schematic drawing to show some critical parameters including ocular rigidity, volume distributions and aqueous and blood flow in the normal eye. Reference :- A K KHURANA; pg num:-03