Made for humans but used by many people on their dogs:

Optrex Eye Wash is a medicated lotion which provides active relief for sore, irritated, dusty and tired eyes; to leave your eyes feeling soothed, cooled, refreshed and cleansed. Complete with free eye bath, Optrex Eye Lotion contains the mildly astringent active ingredient Hamamelis Virginiana to bring fast relief to minor eye irritations.