I have never used salt water to clean eyes. I would have thought that would make them sting?
It certainly sounds as if something has caused inflammation and she needs to see a vet. Eyes are not something you should delay having checked.
The panting may be because of the pain. She may even be running a bit of a high temperature.
A well known home remedy for canine sore eyes is lukewarm tea ( without milk or sugar ) and that will sometimes help minor irritations or soothe the eye while you wait for a vet appointment, but red sore eyes do need to be properly checked.
Cavaliers......Faith, The Ginger Tank and Woody.
Japanese Chins.... Dandy, Benny, Bridgette and Hana.
Remembered with love......... Tommy Tuppence and Fonzi