Question

list 2 causes of presbyopia. draw labelled diagram of a lens used for correction of this defect of vision.​

Answer 1

1. when cilliary muscles is not work properly

2. deflection of eye ball

Answer 2

CAUSES OF PRESBYOPIA

•The cornea is the clear, dome-shaped front surface of your eye.

•The lens is a clear structure about the size and shape of an M&M's candy.

•Both of these structures bend (refract) light entering your eye to focus the image on the retina, located on the inside back wall of your eye.