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Persol is an Italian luxury eyewear brand specializing in the manufacturing of sunglasses and optical frames. It is one of the oldest eyewear companies in the world and is owned by the Luxottica group. The name is derived from the Italian per il sole, meaning "for the sun". Formed in 1917 by Giuseppe Ratti, Persol originally catered to pilots ...
Nuclear sclerosis is an age-related change in the density of the crystalline lens nucleus that occurs in all older animals. [1] It is caused by compression of older lens fibers in the nucleus by new fiber formation. The denser construction of the nucleus causes it to scatter light. Although nuclear sclerosis may describe a type of early ...
The first contact lenses were made of glass, in 1888. Initially the glass was blown but soon lenses were made by being ground to shape. For the first fifty years, glass was the only material used. The lenses were thin, yet reports of injury were rare. In 1938 perspex (polymethylmethacrylate, or PMMA) began to replace glass in contact lens ...
Dogs have ear mobility that allows them to rapidly pinpoint the exact location of a sound. Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance. [41] Dogs can lose their hearing from age or an ear infection. [42]
The Know Your Pet DNA Breeds & Health kit is developed by Ancestry, the makers of the most scientifically advanced DNA test for dog breeds on the market that analyzes twice the amount of a dog's ...
27-32 inches (68-81 centimeters) Weight. 60-70 pounds (27-31 kilograms) Kennel club standards. Fédération Cynologique Internationale. standard. Dog (domestic dog) The Polish Greyhound (Polish: chart polski, pronounced [xart ˈpɔlskʲi]) is a Polish sighthound breed. Despite its name, it is not a direct relative of the Greyhound dog. [1][2][3]
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