I am speaking English with google translator. Please understand. First of all, I had eyes with no eyelids. And then I met Opti-fold. it did last for the first time in three weeks, all day long. It was so exciting. Now I have natural double eyelids. I didn't believe it at first, but I began to believe it. Opti-fold is a great tool. Believe it and use it constantly. Thank you, Ray.