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An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature.
The human eye, showing the iris and pupil. In 1802, philosopher William Paley called it a miracle of "design."In 1859, Charles Darwin himself wrote in his Origin of Species, that the evolution of the eye by natural selection seemed at first glance "absurd in the highest possible degree". [3]
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: Tilted his head up while closing his eyes; Looked at the ceiling with his eyes while keeping his head stationary
Many critics of evolution claim that they can't see the evidence and therefore they don't believe in it. Some traits take thousands of years to develop into a visible change. However natural ...
According to Yelmen et al. 2019, the two main components of Indian genetic variation; the South Asian populations that "separated from East Asian and Andamanese populations" form one of the deepest splits among non-African groups compared to the West Eurasian component because of "40,000 years of independent evolution".
Pseudostrabismus is the false impression that the eyes are misaligned, which may lead to the incorrect diagnosis of strabismus. Pseudostrabismus is more likely to be observed in East Asian or Native American infants, due to the presence of epicanthic folds obscuring the medial aspect of each eye.
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The evolution of color vision in primates is highly unusual compared to most eutherian mammals. A remote vertebrate ancestor of primates possessed tetrachromacy , [ 1 ] but nocturnal , warm-blooded , mammalian ancestors lost two of four cones in the retina at the time of dinosaurs .