First step: Apply something cold to the area. It helps ease swelling and narrows your blood vessels. That will stop bleeding below your skin. Make a crushed ice pack, grab a bag of frozen veggies, or use a cold gel pack. Wrap it in a cloth so it doesn’t have direct contact with your skin. Hold it to your eye for 10 minutes intervals every 1 to 2 hours. Take 10 minutes off so the ice doesn’t damage your skin.
Besides icy treatment, there isn’t much you can do except to avoid anything that could cause further injury. Don’t put pressure on your eye or try to force it open. If it hurts, take ibuprofen