How long does one eye take to clear up from a stye?

Weeks to months: Usually takes a week or two but can last months sometimes. Drops and heat speed up the process. Rarely needs to be opened surgically.

Compresses!: You can use warm compresses - a washcloth with warm water and hold it to the closed eye for 5-10 minutes 3 times a day. You can massage it with your fingers after the compress, but do not aggravate it. You are trying to get it to drain on its own. You may need it incised and drained if this does not work. See and ophthalmologist. A sty is not and infection, so antibiotics do not help.