Q. Which one is correct about the focusing of the eye?
A) Hypermetropia (hyperopia) may be corrected by a diverging lens
B) The focus of the eye is controlled exclusively by the parasympathetic innervation of the ciliary body
C) The lens is the chief refractive element of the eye
D) When the eye focuses on a distant object, the ciliary muscle contracts
Explanation
Hyperopia (hypermetropia) is corrected with a converging lens. It relaxes when the eye focuses on a distant object. The main refractive element of the eye is the cornea, the lens is the focusing element. When the eye is focused on a near object the ciliary muscle contracts.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.