What fills the space between the cornea and the iris?

The space between the cornea and the iris is filled with aqueous humor, a clear fluid produced by the ciliary body. This fluid plays a crucial role in maintaining intraocular pressure, providing nutrients to the avascular structures of the eye, and facilitating the removal of metabolic wastes. The aqueous humor circulates through the anterior chamber (the space between the cornea and the iris) and then drains through the trabecular meshwork at the angle formed by the cornea and iris, ensuring proper eye health and function.

In contrast, vitreous humor occupies the space between the lens and the retina and is a gel-like substance that helps maintain the shape of the eye. Orbital fat serves primarily as cushioning and support within the eye socket, and the choroid is a layer of blood vessels located behind the retina that provides nourishment to the outer layers of the retina. All these structures serve important functions but do not fill the space directly between the cornea and iris as aqueous humor does.