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
A 35 years old hypermetrope is using 1.50D sphere both eyes. Whenever his glasses slip downward on his nose he will feel that his near vision – 
Select and explain. 
A. Becomes enlarged, B. Becomes distorted, C. Becomes decreased, D. Remains the same
A: Becomes enlarged
Answer: A: Becomes enlarged 
Explanation: The farther a convex lens is from the eyes the more it relieves accommodation because its focus is brought by so much nearer to the retina, hence a weak lens at a distance has the same effect as a more proximal and stronger one.
For this reason, old people sometimes prefer to wear their spectacles on the tip of the nose.

"In this reason, old people sometimes prefer to slip the concave reading glasses for down towards the tip of the nose, in order to make a weak glass to do the office of a stronger glass in improving the distinctness of the print". ___ The optician's manual