Although I sent them the prescription immediately upon request, the lenses didn't work well. After going through many difficulties installing them, following the instructions, they didn't work well, either up close or far away. When I tried to uninstall them, one broke. I decided to throw them away, since more is lost in war. My annoyance is that, in the name of making a sale, they don't adequately target the customer, using low prices as a cover. I found another excellent site that does explain why they are more expensive and gives you the option to decide.