How Do You Keep Your Eyes Closed When You're Under the Water?

I always close my eyes when I'm under the water and I try to take myself away from that environment because it's so stressful. My one friend, Nick, who serves big waves in Portugal, he says he imagines that he's in like this big rave,. So he takes himself there. For me, while I'm under there, I pray and I also countBecause when I'm training, I do, I swim under the water  and I just count. And keeping my eyes closed. Also, I've also heard that when your eyes are open and you guess it's a very intense experience you use more oxygen.