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Glaucoma is a progressive condition the eye causes damage to the optic nerve. [7] The damage to the optic nerve is usually caused by intraocular pressure [8] of the eye being elevated. Glaucoma can be seen in dogs, and less commonly, cats. Treatment [9] can be in the form of ocular medication, like prescription eye drops.
Lumosity is an online program consisting of games claiming to improve memory, ... performance in school, at work, or in athletics" or "[delay or protect] ...
White cats having one blue and one other-colored eye are called "odd-eyed" and may be deaf on the same side as the blue eye. [16] This is the result of the yellow iris pigmentation rising to the surface of only one eye, as blue eyes are normal at birth before the adult pigmentation has had a chance to express itself in the eye(s).
The phrase "fight like cats and dogs" reflects a natural tendency for the relationship between the two species to be antagonistic. [8] [9] [10] Other phrases and proverbs include "The cat is mighty dignified until the dog comes by" and "The cat and dog may kiss, but are none the better friends." [11]
People often have misconceptions about guide dogs, including believing they work all the time. In reality, the dogs usually work only when their handler leaves their residence. The handler tells the dog where they want to go, and the dogs are taught intelligent disobedience—blocking the handler from proceeding when there is an unsafe situation.
Therapy cats at work, New Jersey, US. Some cats, called "therapy cats" are trained to help ailing humans in a medically beneficial way to take advantage of the human-animal interaction for purposes of relaxation and healing. Certain breeds are desirable when looking into therapy cats due to their personality and temperament.
The pupil of the eye dilates in the dark to enhance night vision. Shown here is a pupil of an adult naturally dilated to 9 mm in diameter in mesopic light levels. The average human eye is not able to dilate to this extent without the use of mydriatics. Nocturnal mammals have rods with unique properties that make enhanced night vision possible.
Leonardo da Vinci: The eye has a central line and everything that reaches the eye through this central line can be seen distinctly. Alhazen (965 – c. 1040) carried out many investigations and experiments on visual perception, extended the work of Ptolemy on binocular vision, and commented on the anatomical works of Galen.
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