I'm sorry the cherry eye is back.
Maybe the drops allowed the swelling to go down and then once they were gone it swelled back up?
He is a darling lil guy! Love the wrinkles! Along with keeping the wrinkles around his mouth clean, you also need to keep the wrinkles on his head clean too - my son has a SharPei and I noticed that if the wrinkles got dirt in there, it caused a slight skin irritation if not cleaned regularly.