Technically, the glasses have a distance sensor embedded ... The design is small, light, can produce plano-convex or plano-concave lenses, and can do so quickly (within 15 ms) and with low ...

Using 3D-printed fused silica templates, we show that concave as well as convex lens structures can be obtained at high precision by remelting the glass without trading-off on material quality.

The first spectacles, designed to correct farsightedness, bore glass magnifiers that ... he discovered that plano-convex and plano-concave lenses worked best—that is, lenses with a plane on ...

A plano-concave lens is a lens with one side being flat and the other side being concave. It is characterized by being thin in the center and thick at the edges, and can make parallel light rays ...