What is the vitreous primarily composed of?

The vitreous humor, or vitreous body, is primarily composed of a thick, transparent liquid that consists mostly of water. It is the gel-like substance that fills the space between the lens and the retina in the eye, providing both structural support and maintaining the shape of the eyeball. The vitreous humor is about 99% water, with the remaining 1% containing various proteins, collagen fibers, hyaluronic acid, and other molecules that contribute to its gel-like consistency and help keep the retina in place. This composition is vital for the proper functioning of the eye, including allowing light to pass through to the retina without obstruction.