Feb 6, 2023 · AUSTIN, Texas — Long believed to be a uniquely human trait crucial for communication, visible white sclera — the “whites of the eye” — occur more commonly in chimpanzees and other mammals than previously reported, finds a new study from researchers at The University of Texas at Austin.

Baboons, like other old world monkeys and apes, have eyes which can discern blue, green and red wavelengths of light The evolution of color vision in primates is highly unusual compared to most eutherian mammals.

Surprisingly, though, eyes with a white sclera are rare among the other great apes. This may be because their societies are less cooperative, and it’s more important to hide the direction of gaze from each other, so as not to give away the location of food, for instance.

Mar 13, 2023 · Our eyes allow us to communicate with other people without needing to talk. This is in part because of the color variation between our iris and sclera (the white part of the eye), explains Kevin Lee.

Jun 21, 2021 · Here, we provide a comparative analysis of ocular pigmentation patterns in 15 species of hominoids (humans, great apes & gibbons) that show marked differences in social cognition and quantify...

Researchers examined the effect of head and eye movement on changing gaze direction in humans and other great apes. A human experimenter, observed by either a human infant, a gorilla, a bonobo, or a chimpanzee, did one of four actions:

Jun 21, 2021 · Here, we provide a comparative analysis of ocular pigmentation patterns in 15 species of hominoids (humans, great apes & gibbons) that show marked differences in social cognition and quantify scleral exposure at the genus level.

Humans, apes, monkeys and most predators, including birds and mammals, have forward-facing eyes, in the front of their head. This gives them binocular or stereoscopic vision which enables the animal concerned to judge depth and distance.

Oct 15, 2022 · Here we quantify substantial interspecific variation in eye shape and colouration across 77 primate species representing all extant genera of anthropoid primates. We reassess a series of...

May 1, 2022 · Overall, we identified that humans have unique external eye morphology among other great apes, which ensures the robustness of eye-gaze signals in various visual conditions. Our results support and also critically update the central premises of …