This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and refraction, Subject name: Ophthalmology
Advantages of contact lens are all except - 
Select and explain. 
A. Beneficial in Anisometropis, B. More cosmetically accepted, C. helpful in dry eye, D. Improved corneal oxygen supply
D: Improved corneal oxygen supply
Answer: D: Improved corneal oxygen supply 
Explanation: Advantages: (i) Less magnification (5%) of the image, (ii) elimination of aberrations and prismatic effect of thick glasses, (iii) wider and better field of vision, (iv) cosmetically better accepted by young persons. Disadvantages: (i) more cost, (ii) cumbersome to wear,especially in old age and in childhood, (iii) corneal complications may occur. Reference : A K KHURANA OPHTALMOLOGY,Edition 4,Page-519