Which structures are included in the adnexa of the eye?

The adnexa of the eye refers to the accessory structures that support and protect the eyeball itself. This includes components that are critical for the eye's function but are not part of the eye's globe. The correct option encompasses the orbit, extraocular muscles, eyelids, and lacrimal apparatus, all of which fall under the categorization of adnexal structures.

The orbit houses the eyeball and contains the structures that support the eye, such as the extraocular muscles that control eye movement. The eyelids function to protect the eye and help distribute tears across the surface. The lacrimal apparatus is essential for tear production and drainage, maintaining the moisture necessary for eye health. Collectively, these components work synergistically to ensure optimal visual function and protection of the eye.

In contrast, the other choices list structures that are primarily parts of the eye itself or related to its internal functions. For instance, the cornea, retina, conjunctiva, and lens are all integral components of the eye's globe without being part of the adnexal structures, and the pupil, iris, sclera, and vitreous body relate to the internal anatomy and function of the eye rather than its supporting framework. The optic nerve, choroid,