Eyeball Frog

The Eyeball Frog is an item in the trading sequence for Ocarina of Time. Link must give the prescription card to King Zora, who will then give Link the Eyeball Frog which he must then rush down to the Laboratory at Lake Hylia before it spoils. Once it is there, Link will be given the eyedrops which he must then rush up to Biggoron in exchange for the Biggoron Sword.