Which of the following has an INCORRECT pairing between an eye part and the corresponding organ?

The upper eyelid is traditionally associated with the spleen rather than the stomach in Traditional Chinese Medicine (TCM). In TCM, organs do not function in isolation; they have relationships with various aspects of the body, including parts of the eyes. The upper eyelid reflects the health and function of the spleen, which plays a critical role in fluid metabolism and digestion.

In contrast, the other pairings are accurate representations of TCM theory. The eye corners are indeed related to the heart, as emotions and the state of the heart can manifest in the eyes. The sclera's relationship with the lungs highlights the concept that the lung qi influences the clarity and color of the sclera. The iris being linked to the liver is also consistent with TCM principles, where the liver is responsible for the smooth flow of qi and blood, reflecting its condition in the eyes.

Thus, while the upper eyelid relates to the spleen, the other associations remain correct according to TCM doctrine.