Flat Lens...

Scientists at Harvard have created a lens that focuses light “perfectly” – no aberrations, phase delays, chromatic effects, etc.  If I'm understanding the article correctly, though, it won't be transforming our cameras anytime soon: the new lenses work only at a single wavelength (color) of light.  For color photos, that makes them useless.  For many kinds of industrial optical systems, though, that makes them extremely useful.  These systems would include just about anything using a laser, most especially fiber optics communications systems...