I recently came across information about the harmful effects of blue light on the retina. I've been wanting to try one of these devices for some time now, but I certainly don't want to risk damage to my already not-so-good eyes.
Blue-violet light in the 415nm to 455nm range was identified as being the most harmful to the retina. (Blue-turquoise light in the 465nm to 495nm range, on the other hand, is thought to be essential for vision, and also for regulation of our circadian cycle.)
I'd be interested to hear what MindPlace has to say about this. I'd like to treat myself to a Kasina for my birthday if someone can put my mind at ease about safety.
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