 so when you think about cataract surgery we're going in there with what we call the phacoemulsifier there's energy to break up that old cataract that lens in there because we have to remove that in smaller pieces otherwise if you remove that lens in one piece like they used to do way back in the day you had to really make a large incision and it created all sorts of problems and complications so now we use this phacoemulsifier to break up that lens to remove it in little pieces well that energy