Domestic ferrets are just one breed, the colors are the type of ferrets. Within the genus Mustela, ferrets belong to the subgenus Putorius, from which there are only three extant species: M. putorius, the European polecat; M. eversmanni, the Siberian, or steppe polecat; and M. nigripes, the black-footed ferret.
Nearsightedness, also known as myopia, is a common type of refractive error where close objects appear clearly, but distant objects appear blurry. The cornea and lens bend (refract) incoming light rays so they focus in front of the retina.earsightedness, also known as myopia, is a common type of refractive error where close objects appear clearly, but distant objects appear blurry. The cornea and lens bend (refract) incoming light rays so they focus in front of the retina.
Farsightedness means that itâs easy for you to see things that are far away, but your close-up vision is blurry. The technical term for farsightedness is hyperopia. People can have varying degrees of farsightedness, depending on their eyesâ ability to focus on close-up objects.arsightedness means that itâs easy for you to see things that are far away, but your close-up vision is blurry. The technical term for farsightedness is hyperopia. People can have varying degrees of farsightedness, depending on their eyesâ ability to focus on close-up objects.