The space defined by the cornea and iris anteriorly and posteriorly that is filled with aqueous humor is called what?

• A. posterior chamber
• B. anterior chamber
• C. lens capsule
• D. vitreous chamber

Answer: (B)

Think of the eye’s front segment as two fluid-filled spaces separated by the iris. The space between the cornea in front and the iris behind is the anterior chamber. Aqueous humor is produced by the ciliary body, flows from the posterior chamber through the pupil into this anterior chamber, and then drains out. The other options describe different structures or spaces: the posterior chamber is behind the iris (between iris and lens), the lens capsule is part of the lens itself, and the vitreous chamber lies behind the lens and contains vitreous humor. So, the space between the cornea and iris that holds aqueous humor is the anterior chamber.