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
[{'content': 'Depth of AC is: \nSelect and explain. \nA. 2-3 mm, B. 3-4 mm, C. 4-5 mm, D. 6-8 mm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Anterior chamber(AC) - space between the posterior surface of cornea & the Anterior surface of iris. Depth of anterior chamber is measure from center of cornea to center of pupil average 2.5mm shallow AC- in elderly women, hypermetropes deep AC in young males, myopes volume -0.25 to 0.3 ml BOTH AC AND PC CONTAINS AQEOUS HUMOUR Posterior chamber(PC) - space betwee the posterior suface of iris and anterior surface of lens. Anterior Segment - All structures anterior to Lens (Ant segment = AC +PC) Posterior Segment - all structures posterior to lens', 'role': 'assistant'}]