Please choose the correct ending to complete the given sentence: Health: [header] How to get rid of a red eye [title] Do your research on eye drops. [step] There are many different types of eye drops, each one recommended for different circumstances. For example, if you have red eyes and wear contact lenses, a blood vessel constricting drop may not work.

Ending1: If you are allergic to red eye, you may need a prescription to get rid of that symptom. Learn more about how apply eye drops to different situations. Ending2: It wouldn't be able to get through the lens to treat your redness. [substeps] Most eye drops work by constricting the blood vessels in the eyes. Ending3: Not only will it put pressure on your eyes, but it could also cause distress. [substeps] Latex eye drops help reduce inflammation. Ending4: On the other hand, if your dark circles are severe, redness may be a concern. These factors determine what kind of drops you can take.

Answer format: ending1/ending2/ending3/ending4