What is the function of the aqueous humour?

What is the function of the aqueous humour?

• A. Lubricates eyelids
• B. Drains tears
• C. Nourishes the cornea and lens
• D. Helps regulate intraocular pressure

Answer: (C)

The main idea is that the aqueous humor supplies nutrients to parts of the eye that don’t have their own blood vessels. The cornea and the lens are avascular, so they rely on this fluid to bring in nutrients like glucose and amino acids and to remove waste. This nourishes those structures and helps keep them clear and functioning properly. The aqueous humor is made by the ciliary body, flows from the posterior chamber through the pupil into the anterior chamber, and is drained to maintain healthy eye pressure. While it does help regulate intraocular pressure, the reason this option is the best fit is that nourishing the cornea and lens is the most direct and essential function given their lack of blood supply. Lubrication of the eyelids is provided by the tear film, and tear drainage is handled by the lacrimal system.

The main idea is that the aqueous humor supplies nutrients to parts of the eye that don’t have their own blood vessels. The cornea and the lens are avascular, so they rely on this fluid to bring in nutrients like glucose and amino acids and to remove waste. This nourishes those structures and helps keep them clear and functioning properly. The aqueous humor is made by the ciliary body, flows from the posterior chamber through the pupil into the anterior chamber, and is drained to maintain healthy eye pressure. While it does help regulate intraocular pressure, the reason this option is the best fit is that nourishing the cornea and lens is the most direct and essential function given their lack of blood supply. Lubrication of the eyelids is provided by the tear film, and tear drainage is handled by the lacrimal system.