Aqueous Humor is best described as

• A. the clear fluid filling the space in the front of the eyeball between the lens and the cornea
• B. the transparent jellylike tissue filling the eyeball behind the lens
• C. tough, white outer coat of the eyeball
• D. light sensitive cells that respond to color

Answer: (A)

Aqueous humor is the clear fluid in the front part of the eye. It is produced by the ciliary body and flows from the posterior chamber through the pupil into the anterior chamber, filling the space between the cornea and the lens. This fluid nourishes the cornea and lens and helps maintain the eye’s pressure. It’s different from the jelly-like substance that fills the space behind the lens (the vitreous humor), the tough white outer coat (the sclera), and the light-sensitive cells (rods and cones) that detect light. That is why the description of a clear fluid filling the space in front of the eyeball between the lens and the cornea best matches aqueous humor.