It worked by lens technology where spectacles are connected with optical lens integerated with spectacles where when light passes throught it reflect back bad light and get good light get into through it on eye to see better and study of lens known as opthamology. The lens has different like cyclindral ,speherical and oval with various dynamics power and there is options of getting understanding of its through it by studying of about eye such as eye movement and its ecosystem and various things of studying about of light such reflection, refraction and prism of light and its instrument. The study field of optomecian also known as optometry.