Which statement best describes the composition of the fundus?

• A. The fundus contains the retina, optic disk, and retinal vessels.
• B. The fundus contains the cornea, iris, and lens.
• C. The fundus contains the choroid, ciliary body, and zonules.
• D. The fundus contains the sclera, conjunctiva, and episclera.

Answer: (A)

The fundus refers to the back interior surface of the eye visible during a retinal exam, and the structures you see there are the retina, the optic nerve head (optic disk), and the retinal vessels. These are the components that form the fundus image when you gaze into the back of the eye. The other options involve parts of the eye that are not part of the fundus: the cornea, iris, and lens are in the front (anterior segment); the choroid, ciliary body, and zonules are related to the uveal tract and lens support rather than the inner surface you observe in the fundus; and the sclera, conjunctiva, and episclera are outer coverings of the eye.