What does the neural tunic consist of?

The neural tunic of the eye consists primarily of the retina, which is the layer of tissue at the back of the eye that contains photoreceptor cells. These photoreceptors—rods and cones—are crucial for converting light into electrical signals that are then transmitted to the brain via the optic nerve. The retina is involved in processing visual information and is integral to our ability to see, making it central to the function of the visual system.

In contrast to the neural tunic, the other options include structures that are either not part of the neural framework or pertain to different components of the eye's anatomy. For example, options involving the eyelids, lacrimal system, and bony sockets are related to protective and supportive functions of the eye rather than its neural structure. Therefore, recognizing that the neural tunic specifically refers to the retina underscores the importance of this layer in the overall function of the eye.