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> a few years ago there was a study of the benefit of wearing blue tinted > glasses in buildings that have florescent tubes to light the interior. > i understand that florescent tubes can make a persons gait worse and > that blue tinted glasses helped to maintain a normal gait. > question, what percentage of blue tint or how dark should the lenses be. That was quite a few years ago! have a look at the PIEN archives, you will find it maryse cg JOhn 77,17 ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn