The contact lens
Early glass models were thick and could only be worn for a few hours a day. Glass lenses eventually became smaller and lighter, but it wasn't until 1971 when Otto Wichterle invented the soft contact lens that they became commonplace.
Now, not only are contact lenses widely used for correcting vision, we are just steps away from digitized contacts that are themselves a heads-up augmented reality.
April 26, 2013 1:55 PM PDT
Photo by: Wikipedia
| Caption by: James Martin
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