With free-form lenses (also called digital high-definition lenses), the fabrication of the lenses from wearer's eyeglass prescription is optimized with computer-controlled surfacing equipment that is much more precise than conventional tools.
Medical Imaging began with radiography after the discovery of x-rays in 1895 by Wilhelm Roentgen, rÃ¶ntgen A german professor of. physics
In early 1896, X-rays were being utilized clinically in the United States for such things as bone fractures and gun shot wounds. Take a look at these early x-rays.----- Review: X-rays were discovered by William Roentgen while experimenting with a cathode radiation .