Battery acid in the eye is an emergency, and is quite dangerous, if the acid has gone inside the lids, touching the surface of the cornea
. The first aid
is washing the eye with lots and lots of water, for about 15 mins continuously, and may be even more. You should not be running around to look for anything other that tap water, as time is crucial. If the vision is good, if the eye is not red, watering and painful, than probably the eye was closed when the acid went on the eye. A white line outside lash line is probably a burn. However, it is best to show to an doctor, or atleast an Optometrisst, even at this stage so that worst things are ruled out. All the best!