Search results
Results From The WOW.Com Content Network
The eye of a horse. The equine eye is one of the largest of any land mammal. [1] Its visual abilities are directly related to the animal's behavior; for example, it is active during both day and night, and it is a prey animal. Both the strengths and weaknesses of the horse's visual abilities should be taken into consideration when training the ...
[S 23] In 1901, French military veterinarian Adolphe Guénon published a comparative psychology study titled L'Âme du cheval, where he characterized the horse's brain as relatively simple compared to that of humans. [H 3] Starting in the late 19th century, there was a global interest in animals believed to demonstrate intelligence.
Myopia, with or without astigmatism, is the most common eye condition in horses. [1] Several types of occlusion myopia have been recorded in tree shrews, macaques, cats and rats, deciphered from several animal-inducing myopia models.
The horse has a wide field of monocular vision, as well as good visual acuity. Horses have two-color, or dichromatic vision, which is somewhat like red-green color blindness in humans. [27] Because the horse's vision is closely tied to behavior, the horse's visual abilities are often taken into account when handling and training the animal.
A horse has higher acuity through most of the visual field of its eyes than a human has, but does not match the high acuity of the human eye's central fovea region. [45] Spherical aberration limits the resolution of a 7 mm pupil to about 3 arcminutes per line pair.
An analysis of genome data from 475 ancient horses and 77 modern ones is providing clarity. It revealed that domestication actually occurred twice - the first time being a dead end - and traced ...
However, because horses have strong monocular vision, it is possible for a horse to position one ear forward and one ear back, indicative of similar divided visual attention. This behavior is often observed in horses while working with humans, where they need to simultaneously focus attention on both their handler and their surroundings.
Cataracts are the result of the opacification [4] or cloudiness of the lens in the eye. Cataracts can be developed through old age, diseases or trauma to the eye. [5] Some animals that are prone to the development of cataracts are dogs, elephants, horses, pandas and seals.