Speaking of eyes, if you are old and have dry eyes and need eye drops, try this, which is legit Scientific Method. Get a cheap red led flashlight from ammie, and shine it in your eyes in the morning for 3 minutes. The mitochondria love it and it takes 10 years off your eyes. Lots of articles on that. Then I go to my blue light because there's no sunlight in Canada right now. I've stopped using eye drops and I read constantly on my ebook.