This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Fluctuating refractive errors with cataract are seen in 
Select and explain. 
A. Morgagnian cataract, B. Diabetic cataract, C. Intumescent cataract, D. Traumatic cataract
B: Diabetic cataract
Answer: B: Diabetic cataract 
Explanation: B i.e. Diabetic cataract Feature Found in Frequent change of presbyopic glasses Open angle glucoma Q Second sight (index myopia neutralizes the plus power of presbyopia & patient is able to see small prints without spectacles) Nuclear cataractQ Fluctuation of refractory error (high level of aqueous glucose is metabolized by aldose reductaseQ into sorbitol which then accumulates with in lens resulting in secondary osmotic over hydration of lens. Hypeglycemia leads to fluctuating myopia) Diabetic cataract Q Shield like cataract A topic dermatitis Q