What is the primary function of the aqueous humor in the eye?

The primary function of the aqueous humor is to maintain intraocular pressure. This fluid is produced by the ciliary body and fills the anterior and posterior chambers of the eye. By maintaining a subtle balance of pressure, the aqueous humor plays a crucial role in supporting the shape of the eyeball, which is essential for proper vision.

Intraocular pressure is vital for ensuring that the eye maintains its spherical shape, allowing the retina to be adequately positioned to capture images. If the pressure is too high or too low, it can lead to vision problems or conditions such as glaucoma, where increased pressure can damage the optic nerve.

While the aqueous humor does provide some level of nutrients to the avascular structures of the eye, like the lens and cornea, its primary and most critical role is in maintaining this intraocular pressure. Thus, the maintenance of intraocular pressure is fundamental to the overall health and function of the eye.