Saturday, April 14, 2007

Viking Lenses

Viking lenses

Whilst reading up on laser eye surgery and 20/20 vision, I came across this page on Viking lenses. A quote:

The shape of the lenses gives them a resolution and an optical precision which greatly surpasses the best glasses available today, in the year 2000. Only special lenses for scientific or professional use are made to an optic resolution as high as the Visby lenses.

So much for perpetual progress, then. My ancestors were rather adept at fine jewellery, as well as (say) discovering America, empowering women, and architecture.


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