Human eyes are distinct due to their large white sclera surrounding the iris, a feature that sets us apart from most mammals, which typically have dark eyes. This white area enhances our ability to communicate by making it easier to discern where someone is looking, as highlighted by research from Shiro Kohshima, who first studied this phenomenon in 1997. The contrast between the white sclera and dark pupils allows for better visibility of eye movement, which is crucial for social interactions and bonding. The cooperative eye hypothesis, proposed by Michael Tomasello in 2007, suggests that this feature has evolutionary advantages, aiding in collaborative tasks such as hunting. Furthermore, studies indicate that human infants are particularly adept at following eye gaze, which supports language development. However, some researchers, like Juan Perea-García, argue that the contrast between sclera and iris is more significant than sclera color alone. Additionally, the sclera can signal health changes, with alterations in color indicating potential medical issues. Overall, the unique structure of human eyes plays a vital role in communication and social interaction.