If its not bothering her too much, I would bathe in cooled boiled water as you say, keep it clean, but if its watering a bit then hopefully if there was anything in there, its been washed out.
However, I will say you can't be too careful with eyes, they may be a slight scratch to the eyeball or something which is not visible unless you put drops in, so would stll recommend a trip to the vets first thing tomorrow, just to be on the safe side
Edited to add ----- how rude of me, your first post and no official
to Purrs