 You know, you ever get to the 12th or 13th green and you feel just like exhausted mentally. It's not because you've been swinging. You think it's maybe because of strategy or whatever, like thinking too much about things or whatever have you. It's none of that. It's the relaxation of your eyes can have an impact on your entire body and the way you feel. And it's not just on the putting surface. That's where you're going to get the best visual advantage.