I had been told I had Sjogrens and having dry eyes. I personally have never felt I had the dry eyes. Never used drops to wet them. However, when I went to my last eye appointment, he suggested I start doing rewetting drops a couple of times a day to keep them moisturized. He could tell on the exam that they were very dry. I still do not notice any difference. In short, what I am saying, is you may have had it but just didn't notice it at times. I think we get used to certain things. When your eyes get overly dry then you notice it more. Just a thought...