Question

A fluid that occupies the larger cavity of the eyeball behind the lens is a_____.

Answer 1

Hint: An eye is a special sense organ situated within the orbit of the skull. Eyes are protected by the bony orbits that help them to anchor to the soft tissue. A fluid that occupies the larger cavity of the eyeball behind the lens is a transparent, colourless, gelatinous mass.

Complete answer:
The eye is a hollow sphere composed of three layers of tissues. The outer layer is the fibrous tunic which has the white sclera and clear cornea. The area of the eye is covered by the sclera, most of which is not visible; humans are unique when it comes to the eye because they have so much of the white matter compared with the other species. The cornea is transparent and it covers the anterior tip of the eye and allows the entry of light to the eye. The middle layer of the eye is composed of the vascular tunic which is mainly composed of the ciliary body, choroid, and iris. The highly vascularized connective tissue makes up the choroid layer which helps in providing blood supply to the eyeballs. Posterior to the ciliary body is the choroid; there is a muscular structure that is attached to the lens by zonule fibres. These two structures bend the lens which allows focusing the light on the back of the eye. Iris is made up of smooth muscle which opens and closes the pupil, which is the hole at the centre that allows the entry of light. The constriction and dilation of the pupil are made by the iris in response to the bright and dim light. The neural tunic is the innermost part of the eye or the retina which contains the nervous tissues responsible for photoreception. The eye can be divided into two parts; the posterior and the anterior cavity. The space between the cornea and the lens is the anterior part and it is filled with a watery substance called aqueous humour. The space behind the lens is the posterior cavity which extends to the posterior part of the interior eyeball where the retina is placed. The posterior cavity is filled with a viscous fluid called the vitreous humour. A fluid that occupies the larger cavity of the eyeball behind the lens is vitreous humour. It is in contact with the vitreous membrane overlying the retina.

Note: The solid transparent media are the cornea and lens that are created by avascular protein fibres which are packed close together. The outermost layer of the cornea is covered by an extra-thin transparent membrane which is the continuation of the conjunctiva. The aqueous humour is fluid-filled media and the vitreous humour is a mix that creates jelly-like media which is transparent.