What is the choroid?

• A. The transparent outer coat of the eye.
• B. The vascular layer of the eye containing connective tissue.
• C. The muscular layer controlling pupil size.
• D. The inner lining of the eyelids.

Answer: (B)

The choroid is the vascular layer of the eye that sits between the sclera (the white outer coat) and the retina. It’s made up of connective tissue with a rich network of blood vessels, supplying oxygen and nutrients to the outer retina and helping to absorb excess light to reduce glare. This contrasts with structures like the sclera (a transparent outer coat isn’t accurate—the sclera is opaque and forms the white of the eye), the iris (the muscular part that controls pupil size), and the conjunctiva (the thin lining of the eyelids).