If you are a long-time Wired subscriber, this is going to be hard for you to read – literally.
For the graying set that thinks these glasses are more Thomas Dolby than Harry Potter, reading anything is more difficult, because of presbyopia, the gradual inability of the eye to focus due to age. Even if you never wore glasses before, all of a sudden – or around age 45 – you are unable to clearly see the text on your computer screen, your iPad, Viagra prescription bottles or your Hoveround’s speedometer.
Until recently, this meant adding reading glasses or switching to bifocals, trifocals or progressive lenses – and if this all sounds foreign to you, it won’t when you get older, whippersnapper. The problem is that reading glasses only have one focal length, bifocals two, and while progressives have many focal lengths, they require you to tilt your head just so to bring things into focus.
But with Superfocus glasses (formerly Trufocals), an adjustable slider lets you set the focal length at will. So you can focus on a computer screen, then look up and adjust the length to a TV across the room or to a cellphone nearer your face. The secret to this adjustable focus is a disk of soft silicone, which can change shape just like your eye's decrepit lens used to.


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