External eye appearance across primate species is diverse in shape and colouration, yet we
still lack an explanation for the drivers of such diversity. Here we quantify substantial …

Pigmentation patterns of the visible part of the eyeball, encompassing the iris and portions of
the sclera, have been discussed to be linked to social cognition in primates. The cooperative …

Many aspects of mammalian visual anatomy vary with activity pattern, reflecting the
divergent selective pressures imposed by low light and high light visual environments …

Comparative studies have shown that the eye morphology of primates has been shaped by
a variety of selection pressures (eg communication, environmental factors). To …

Strepsirrhine and haplorhine primates exhibit highly derived features of the visual system
that distinguish them from most other mammals. Comparative data link the evolution of these …

Gaze following has been argued to be uniquely human, facilitated by our depigmented,
white sclera [M. Tomasello, B. Hare, H. Lehmann, J. Call, J. Hum. Evol. 52, 314–320 (2007)] …

Among primates, nocturnal species exhibit relatively larger orbital apertures than diurnal
species. Most researchers have considered this disparity in orbital aperture size to reflect …

External eye appearance in avian taxa has been proposed to be driven by social and
ecological functions. Recent research in primates suggests, instead, that, photoprotective …

There is a wide variation in the external eye morphology across species in primates, which
is considered to reflect adaptation to ecological factors such as body size and habitat type …

Ambient light levels influence visual system size in birds and primates. Here, we argue that
the same is true for humans. Light levels, in terms of both the amount of light hitting the …