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
Which of the following is most impoant factor for refractive errors: March 2007 
Select and explain. 
A. Lens, B. Vitreous hemorrhage, C. Aqueous humour, D. Axial eyeball length
D: Axial eyeball length
Answer: D: Axial eyeball length 
Explanation: Ans. D: Axial eyeball length The condition in which incident parallel rays of light do not come to focus upon the light-sensitive layer of the retina may be due to: Abnormal length of the globe-Most impoant Abnormal curvature of the refractive surfaces of the cornea and the lens Abnnormal refractive indices of the media-aqueous or vitreous. Abnormal position of the lens