Which of the following structures is part of the vascular layer of the eyeball?

• A. Cornea
• B. Retina
• C. Choroid
• D. Sclera

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the anatomy of the eyeball, which consists of three layers: the fibrous layer, the vascular layer, and the inner layer. Each layer has specific structures associated with it.
2. Step 2: Recall that the vascular layer, also known as the uvea, is responsible for providing blood supply to the eye and includes the choroid, ciliary body, and iris.
3. Step 3: Review the functions and locations of the listed structures: the cornea and sclera are part of the fibrous layer, the retina is part of the inner layer, and the choroid is part of the vascular layer.
4. Step 4: Confirm that the choroid is the correct answer because it is a structure within the vascular layer, providing nutrients and oxygen to the retina and other parts of the eye.
5. Step 5: Reinforce the concept by noting that the vascular layer plays a critical role in maintaining the health of the eye by supplying blood and regulating light entering the eye through the iris.