From Brotato Wiki
Burning activates +10%faster
Eyes Surgery is an in-game item that can be bought from Shop or can be found in a Crate. Most Items increase the Stats of the player while some of them provide unique effects.
Eyes Surgery is a unique item. Unique items can only be bought or found once per run.
Eyes Surgery reduces the time between each tick of burning damage. The same amount of damage will be dealt, but it is dealt over a shorter amount of time, increasing the Damage per Second.