New invention of professor Silver from Oxford will help soon many people, having problems with sight. He invented glasses able to measure dioptre by themselves. You can adjust the dioptre level you need with a regulator. People, wearing glasses, know how much time and money they spend on visiting the doctor and glasses making out. Then new lenses are to be made as well as eyeglasses frame. And this is the new expenses. It is known that its necessary to change the optics in eyeglasses every one or two years, depending on the improvement or worsening of your sight.