This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'The antero-posterior diameter of the lens is increased in all except \nSelect and explain. \nA. Intumescent cataract, B. Accommodation, C. Weill-Marchesani syndrome, D. Morgagnian cataract', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Morgagnian cataractOption a - In cortical cataract, due to progressive hydration, swelling (increase in AP diameter) of the lens occurs making the anterior chamber shallow.Option b - Increase in the anterior lens capsule curvature with axial lens thickness due to the action of ciliary muscle on zonules.Option c - Weill-Marchesani syndrome is associated with Microspherophakia, (small, spherical lens) leading to increase in AP diameter (the equatorial diameter decreases).Option d - Morgagnian is a type of Hypermature cataract, wherein the cortical material leaks out and is further liquefied, leaving a wrinkled capsule and a Shrunken lens.', 'role': 'assistant'}]