Inner Parts Of The Eye

Question 1

Lens

Answer 1

Structure:
- it is round, biconvex, flexible, transparent structure, enclosed in an elastic capsule
- it is held in place just behind the iris by the suspensory ligament, which is attached to the ciliary bidy
- has no blood vessels
Function:
The lens cam change shape to allow sharp, precise focusing of light rays on the retina

Question 2

Eye cavities

Answer 2

The interior space of the eye is divided by the lens and suspensory ligament into two cavities: the anterior and posterior cavity.

Question 3

Anterior cavity

Answer 3

Structure: The small anterior cavity is filled with a watery fluid, aqueous humour
F: the aqueous humour provides:
1. Nutrients and oxygen to the lens and cornea and carries away waste
2. Provides the correct pressure in the anterior cavity

Question 4

Posterior cavity

Answer 4

S: the larger cavity is filled with a jelly-like fluid, vitreous humour
F: the vitreous humour:
- provides pressure within the eye, holding the retina firmly against the choroid
- prevents the eyeball from collapsing