About the book: year / It has been proven that we receive most of the information about the world around us through our eyes... And if the priceless gift of nature - vision is impaired, There are devices for its correction. Glasses are a thing so familiar to us today that it is hard to imagine that there was a time when they did not exist... Our book will tell you how the evolution of optical instruments went from the first glasses found in the tomb of Tutankhamun to modern 3D glasses and super-powerful telescopes .You will read about contact lenses, corrective, bifocal, sports, sunglasses, computer glasses... You will learn what refraction, myopia, farsightedness, astigmatism, presbyopia, adaptation, accommodation are... Lornettes, monocles, pince-nez, microscopes, binoculars, telescopes, magnifiers – all these optical instruments also found a place in this educational book, which will be interesting to both adults and children.