Summarize the following:
Wrap a bag of frozen peas in a small cloth, and hold it against your black eye. Alternatively, stick a metal spoon in the refrigerator until it's cold, and then press it lightly against your black eye. Frozen peas are a better cold compress than ice cubes because they easily mould around your face. A cold compress will help to limit the amount of swelling by constricting the blood vessels. Reapply the cold compress approximately every 4 hours over the next 24 hours. Visit your local pharmacy, and pick an analgesic that will help you to cope with the pain over the next few days. Avoid taking aspirin, as this is a blood thinner and can make your black eye look worse. Ask the pharmacist for advice about the best painkiller to take. Blurred vision, bleeding from your eye, a fever, or nausea are all signs that you need to seek immediate medical attention. While a black eye is not normally serious and will often resolve itself within a few weeks, contact your doctor if you have any concerns. These symptoms can suggest a broken bone, increased orbital pressure, or damage to your eyeball. Also see your doctor if your black eye hasn't healed completely within 3 weeks.

Summary:
Apply a cold compress for 15-20 minutes immediately after the injury. Take an over-the-counter pain medication if your black eye is painful. Visit your doctor immediately if you have any concerns.