I have already looked at the sun, and have not gone blind. I only do it in the AM in the first hour after it has risen and in the PM when it is about to set. I also have a full spectrum lamp that I look into. Have you ever read anything about sungazing?
I wasn't sure which ion is better for the body, so I googled it and read an article that said just the opposite about which is good for us. Where did you read about positive ions being good for us? There are even products for adding negative ions to your air. Someone at work had one, and you could feel the air coming out of his office, it felt and smelled like fresh air. Air rich in negative ions was what used to make the forests feel so fresh and clean.