Which fluid maintains the interior shape of the eyeball?

Study for the Visual Impairment Education Certification Test. Explore multiple choice questions, with hints and explanations for each. Prepare thoroughly!

The amount and pressure of fluid inside the eye are what keep the eyeball firm and spherical. The clear fluid in the anterior and posterior chambers, produced by the ciliary body, is the aqueous humor. It flows through the eye and is drained to keep intraocular pressure stable. That pressure supports the globe from the inside, helping maintain its interior shape. The vitreous humor, a gel-like substance filling the back part of the eye, also helps keep the retina in place and contributes to the eye’s form, but it is the aqueous humor’s pressure that primarily maintains the interior shape. The choroid is a vascular layer, and the retina is neural tissue, not fluids.