"A rare material dropped by a defeated Keese. It's fun to look at, but it doesn't seem to have much use. Maybe a collector would be interested in it..."
— In-game description

Keese Eyeballs are items from The Legend of Zelda: Breath of the Wild. They can be dropped by Keese. Link can cook with them and critters to make more powerful elixirs. They are also used in upgrading armor by visiting a Great Fairy.

See also