If you get black pepper in your eye you should immediately rinse the black pepper out of your eye with water.
Take the sprayer from your kitchen sink or the shower wand and run it over your eye to flush the pepper out of the eye.
Or stand in the shower to rinse the black pepper out of your eye but do not rub the pepper further into your eye.
Pull the upper eyelid down over the lower eyelid and blink several times to help flush the pepper out of your eyes.
If the pepper still won't come out of your eye then go to the emergency room to get it cleaned out.
However usually just running water over the eyelids while holding the eyelids open helps to get the pepper out or you can try to force yourself to cry as well to help flush it out.