Ran a MCI involving pepper spray and a house party recently, and we just used lots of saline. With a primed saline bag (think we used 1000's), we just put a sheet over the patient's clothes, tilted their head to the side, and flushed the eye with saline from the tear duct to the other corner for as long as they could tolerate. What might also work is attaching the end of the drip line to a nasal cannula, and placing each of the prongs on either side of the top of the nose, allowing the saline to cleanse the eyes via the tear ducts (similar to how the eyes would naturally cleanse themselves). Don't know if I'd risk using anything that could potentially cause a reaction on such a sensitive area as the eyes...