Certified Paraoptometric (CPO) Practice Exam 2025

Which structure is located behind the cornea and in front of the iris?

1. The anterior chamber

2. The vitreous chamber

3. The posterior chamber

4. The sclera

The correct answer is: The anterior chamber

The structure located behind the cornea and in front of the iris is indeed the anterior chamber. The anterior chamber is the space filled with aqueous humor that is situated between the cornea, which is the clear front part of the eye, and the iris, which is the colored part of the eye. This chamber plays a vital role in maintaining intraocular pressure and providing nutrients to both the cornea and lens. The vitreous chamber is a larger space that contains a gel-like substance and is situated behind the lens, not between the cornea and the iris. The posterior chamber, while also an important part of the eye, is located behind the iris and in front of the lens, further emphasizing that the anterior chamber is the correct answer to the question. The sclera, being the white outer layer of the eyeball, does not lie between the cornea and iris, making it irrelevant in this context.