I have not been tying in almost a year. My eyes started giving me trouble and was diagnosed with serious glaucoma last August 2018 as well as cataracts. This past May. Dr Sayani told me that not if but when we had cataract surgery. I thought about it for a couple of days and told the Dr to set it up. I am now cataract free. Will need reading glasses for closeup work but can see distance without glasses. Without glasses what a concept. Glasses were a part of my life for 50 years. Take care of your eyes. I am amazed by what I am seeing now.