"You checked in the Broken Goron's Sword and received a Prescription! Go see King Zora!"
— In-game description
The Prescription as it appears in-game

The Prescription is a quest item from The Legend of Zelda: Ocarina of Time. Part of the quest for Biggoron's Sword, the Prescription is given to Link by Biggoron in order to collect the World's Finest Eye Drops. The Prescription is then taken to King Zora XVI in Zora's Domain. King Zora XVI informs Link that he does not have the eye drops. However, he has the ingredient, the Eyeball Frog, which should be taken to the Lake Scientist.