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
A male 30 years of age complaints of poor vision in day light which improves in dim light. Which of the following is the most common cause? 
Select and explain. 
A. Cortical cataract, B. Morgagnian cataract, C. Nuclear cataract, D. Steroid induced cataract
D: Steroid induced cataract
Answer: D: Steroid induced cataract 
Explanation: Ans. (d) Steroid induced cataractRef: Ducker's ophthalmology 2/e, p. 412; Parson's 20/e, p. 251Steroid induced cataract is posterior subcapsular which causes the said complaints due to its central position. Age favours PSC than nuclear cataract.