The Beauty of Frog Eyes
"Bull Frogs" can be any one of a number of frogs around the world.
We have a Bull Frog here in the mid-Atlantic U.S. that is a totally different genus & species from the Costa Rican Bull Frog.
I've also seen Bull Frogs in Singapore that are, again, a totally different genus & species from either the Costa Rican one or the U.S. one.
The second eye belongs to what I believe is a frog in the Boana genus.
Perhaps a Boana rufitela given the red between his toes. This frog was about 2" (5 cm) long.
La Selva Research Station, Costa Rica. Photos taken of wild critters where I find them. No posing, pestering, or baiting, & aiming to leave no trace. Corrections welcome to my critter IDs. Olympus EM1 Mark II, M.Zuiko ED 60mm f2.8 Macro, Fenix Headlamp & Focusing Lights, Godox TT350o Flash. DIY Diffuser. Handheld.