What is aqueous humor?

Aqueous humor is a clear, watery fluid that plays a crucial role in maintaining intraocular pressure within the eye. It fills the anterior chamber (the space between the cornea and the lens) and the posterior chamber (the space behind the iris and in front of the lens) of the eye. This fluid is essential for providing nutrients to the avascular structures, such as the lens and cornea, and removing metabolic wastes. By maintaining adequate intraocular pressure, aqueous humor helps keep the eye's shape and supports overall eye health.

This fluid is continuously produced by the ciliary body and drains out of the eye through the trabecular meshwork and Schlemm's canal. If the drainage of aqueous humor is disrupted, it can lead to conditions such as glaucoma, where increased pressure can damage the optic nerve. The other options do not accurately describe aqueous humor: it is not gel-like, a type of eye drop, or a blood component, emphasizing the importance of recognizing the unique properties and functions of aqueous humor in eye health.