[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. 
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.