What structure maintains the overall shape of the eye?

The vitreous humor is a clear gel-like substance that fills the space between the lens and the retina in the eye. It plays a crucial role in maintaining the eye's shape by providing structural support. This gel-like consistency helps to keep the eye from collapsing and also maintains intraocular pressure, which is important for the overall integrity of the eye structure. The vitreous humor allows light to pass through to the retina, where it is converted into signals for the brain, making it essential not just for shape, but for vision as well.

While other structures like the sclera do contribute to the overall shape of the eye, they have additional functions. The sclera, for example, is a tough outer layer that protects the eye and serves as an attachment point for the muscles that move the eye. However, the specific question about maintaining the overall shape points directly to the role of the vitreous humor as it occupies a large volume within the eye and plays a primary role in preserving its round shape.