I was trying another eye drop for a while but I was not happy with it. It was more expensive and didn't work as well as Optimis7. I use eye drops at night or when I first wake up and it really helps with discomfort. The drops I was using would leave a crystalline substance that I had to wash out with hot water or it would bother me all day. I've been using Optimis7 for 12 years now and it works really well, otherwise I wouldn't be calling!
J. C. West