What gives shape to the eye ball?

The eyeball is given its shape by the intraocular pressure (IOP). IOP is the pressure exerted by the fluids within the eye, and it is what keeps the eye from collapsing. The main fluid in the eye is the aqueous humor, which is produced by the ciliary body. The aqueous humor flows through the anterior chamber of the eye, which is the space between the cornea and the iris. It then passes through the pupil and into the posterior chamber of the eye, which is the space between the iris and the lens. The aqueous humor eventually drains out of the eye through the trabecular meshwork, which is a network of tiny channels located near the base of the cornea.

If the IOP is too low, the eye will become soft and may collapse. This condition is called hypotony. If the IOP is too high, the eye will become hard and may eventually lead to glaucoma. Glaucoma is a group of eye diseases that can damage the optic nerve, leading to vision loss.