You approach the tee, select your club, adjust your hands, align your feet and visualize your swing.
It's a routine practiced by millions of golfers around the world. Now imagine doing it with your eyes closed. All the time.
That's the everyday reality for Mario Tobia, a four-time American blind golf champion redefining what's possible on the course.
"When I first lost my vision it was pretty traumatic," Tobia tells CNN Sport. "I had to stop working and things like that.
"Now I actually tell...