The medical root "pupill/o" is related to which part of the eye?

The medical root "pupill/o" is specifically associated with the pupil of the eye. The pupil is the opening in the center of the iris that allows light to enter the eye, and it plays a critical role in regulating the amount of light that reaches the retina. Understanding this root is essential for healthcare professionals as it helps in identifying and describing conditions or procedures related to the pupil, such as an examination of pupillary response, which is important in various medical assessments.

The other terms refer to different components of the eye. For instance, the iris is the colored part around the pupil, the cornea is the clear front surface of the eye, and the lens is behind the pupil, responsible for focusing light onto the retina. Each of these structures has distinct functions, but "pupill/o" is exclusively related to the pupil itself, making it the correct answer in this context.