I have been following this thread intermittently and haven't seen a reference to a very good evaluation; Wright John G., Sunglasses - A Scientific View, published in Sailplane and Gliding, June/July 1989. He is a spectroscoper.

He discusses how the eye works, how it is or can be affected by different radiation wavelengths and shows the results of tests on some sunglasses. Some of the brands may not be available now or in Australia, but the generic info is very relevant.

Graham
--
Dr Graham Holland
27 Johnston Crescent
Lane Cove
NSW 2066
Australia
e-mail: [EMAIL PROTECTED]
ph: 02 9427 3282
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