What is the primary function of the aqueous humor?

The primary function of the aqueous humor is to provide nourishment to the structures in the anterior chamber of the eye, such as the cornea and lens. This clear fluid is produced by the ciliary body and plays a crucial role in maintaining intraocular pressure, which helps to keep the eye shape stable. Additionally, by providing nutrients and removing waste products, the aqueous humor supports the metabolic needs of these avascular structures, ensuring that they remain healthy and functional.

While the other options mention important aspects of eye function or anatomy, they do not capture the primary role of the aqueous humor in nourishing the anterior chamber structures. For instance, the connection of the lens to the ciliary body and the capacity to focus on objects involve different processes and anatomical features, while light refraction primarily relates to the cornea and lens interaction. Thus, the correct answer highlights the essential role of aqueous humor in sustaining eye health.