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
Developed in 1975, the PET scan is a diagnostic tool that allows doctors to picture of how the cells in your body are working and to detect abnormalities. You may not have heard as much about PET scans as you have about MRIs and CT scans.