Hurts your sight too. I have been thinking about investing in some glasses to stop the blue light, would you recommend this? I work online and with the years I've begun to grow in concern for my health.

Also, perhaps you can't answer this but someone else can. Isn't melanin the same that causes skin pigmentation? If that's the case, would it be possible that people with different melanin production (lighter/darker skin) would have differences in their sleep processes?