Excellent product. It was prescribed to me by an ophthalmologist for my condition six years ago and I have been using it ever since. As I'm no longer able to buy it where I live, I have been buying it through Fishpond. I would prefer to buy a smaller bottle - 15 ml, as our pharmacy used to sell. This product here comes in a 30 ml bottle, which is a waste, because you have to discard it 30 days after opening, and in 30 days I only use about 10 ml of the product. I really hope 15 ml bottles will be available here as well.