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 |
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 |
(b)
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.