Today is difficult to find people with perfect vision. With the invention of contact lenses, many people sighed with a relief – they solved many eyes problems and got rid of eyes glasses complexes. Eye Lenses: Necessary invention According to the Canadian Pharmacy statistics , more than half of people wearing lenses are young people aged between 13 and 24. Not everyone knows that the idea of this know-how has been suggested by Leonardo da Vinci. What are eye lenses? The lens is a small piece of a round shape, made of a special material, which is attached to the cornea. The basis of …