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Certified Retinal Angiographer (CRA) Practice Exam

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Which structure in the eye produces aqueous humor?
Correct Answer:
Ciliary Body
Explanation:
The fluid that fills the front of the eye is produced by the ciliary body, specifically the ciliary processes. The nonpigmented ciliary epithelium of these processes secretes aqueous humor into the posterior chamber, then the fluid flows through the pupil into the anterior chamber and exits mainly via the trabecular meshwork into Schlemm’s canal (with some outflow through the uveoscleral pathway). The other structures have different roles: the iris controls pupil size, the retina is the light-sensing neural layer, and the cornea is the clear front surface that is nourished by the aqueous humor rather than producing it.

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