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.
People who are farsighted see things at a distance more easily than they see things up close. If you are very farsighted, close objects may be so blurry that you can't do tasks such as reading or sewing. A farsighted eye sees things differently than an eye that is not farsighted.