when there are a line, you hit. so because we're making this into something more objective, anything is line lines, the reserves are more accurate. >> when is this available and how will it be available? used to download be apps for a certain amount of money. this is a little different. it's a hardware app? >> yes.app. >> yes. so the clip-on is extremely chip. you can buy it for a dollar or two. and our initial goal is to make it available in countries where more than half a billion people have -- lack corrective vision. initial goal is to provide the software app for free and provide the clip-ones to ngos. but i think we are -- this is an indication that the phones can now be used beyond pure communication or microand by using the hardware of the phones now i can imagine where we have