If you get a chemical burn in your eyes or just serious dry eyes, use Castor oil, coconut oil or ghee preferably, it will provide instant relief. I myself have used multiple types of cooking oil & that worked too except DO NOT use olive oil! It was the only one that BURNED! lol I learned the tip years ago working at DFW Airport & got a cleaning spray in my eyes. A pilot gave me castor oil & it stopped the burning immediately.