The fundus contains which structures?

• A. Retina, Optic Disk, and Retinal Vessels
• B. Cornea, Iris, and Lens
• C. Choroid, Ciliary Body, and Zonules
• D. Sclera, Conjunctiva, and Episclera

Answer: (A)

The back interior surface you see during an eye exam, the fundus, is the inner lining of the posterior eye. It includes the retina and the major features on it: the optic disc (the optic nerve head) and the retinal vessels. These are the structures evaluated when you perform a fundus examination because they lie on the inner surface and are visible through the pupil with an ophthalmoscope.

The other groups are not part of the fundus: the cornea, iris, and lens are in the front part of the eye; the choroid, ciliary body, and zonules are behind or around the lens and not the surface features of the fundus; and the sclera, conjunctiva, and episclera are outer coat/coverings of the eyeball, not the inner surface examined as the fundus.