Contact lenses small made from transparent materials lenses, worn directly on the eye for vision correction (i.e., to improve visual acuity).
Contact lenses, according to experts, are about 125 million people in the world. Method of vision correction using contact lenses is called contact vision correction.
Almost 50% of those who wear contact lenses, are young people aged 18 to 25 years. And among those who wear contact lenses for the first time, the proportion of young people under the age of 35 years, almost 90 %.
The story of the creation of contact lenses starts with the name of Leonardo da Vinci. In 1508, he designed the device in a transparent globe filled with water, through which people with poor eyesight can see better.
An-70 medium — range cargo (operational-tactical military transport) aircraft of the new generation of short take-off and landing. Antonov an-70 intended to replace the obsolete An-12. Performed on the aerodynamic configuration vintoventilyatorny four-engine turboprop high-wing monoplane with single-finned tail and tail cargo hatch.
Since 1981, these disks began to advance and now it is not only a device for storing information for computers, and discs with your favorite music or your favorite movies.
The helicopter rotary wing aircraft unit, which are necessary for flight lift and thrust generated by one or more rotors (propellers) driven by an engine or multiple engines. Almost every time the main rotor of the helicopter is equipped with a swash, which moves the center of pressure of the propeller for flight control (with the exception of some schemes with 3 or more rotors).
Snowboarding is a sport that has gained huge popularity in most ski centers all over the world. Similar to skateboarding, plus the unforgettable romantic mountain peaks attracted to this sport more and more people of different ages.
One of the most popular Soviet postwar trucks became the GAZ-51 or, as it was called drivers, is “lawn”. Released in 1946, this 2.5-ton vehicle became the basis for many specialized vehicles — trucks, tractors, vans, tankers, cranes and buses. However, as time went on, and won the national love the truck gradually handed over their positions — the country needed a more powerful, higher gross weight and higher speed machine.
