If you get pepper spray in your eye you should rinse the pepper spray out of your eyes with water.
You may have to rinse the pepper spray off your eyes for a few minutes several times before the pepper spray is fully washed off.
You can also use some baby shampoo near the eye to help clean the pepper spray out of your eye but don't put the baby shampoo in your eye just put the shampoo near the eye.
You can also dab some milk around the eyelid to help clean the pepper spray off.