RIO DE JANEIRO, Brazil — Claudio Paulo Pinto is looking to break an eye-popping record. Literally.

Pinto can pop his eyeballs at least 7 millimeters (0.3 inches) out of their sockets, a national record for eye-popping, according to RankBrasil, an organization modeled after the Guinness Book of World Records that lists Brazilian records.

"I was measured by an ophthalmologist in January. I could pop my eyes out 7 millimeters," Pinto said by telephone Saturday. "Since then, my capacities have improved."

That could put Pinto close to the world record. The title of "furthest eyeball popper" in the Guinness Book of World Records belongs to Kim Goodman, of Chicago, who can pop her eyeballs 11 millimeters (0.43 inches) out of her sockets.