Well, generally speaking, yes, castor oil can just help to treat dry eyes. In common, castor oil is extracted from a plant which grows through the world. And it is one of the most commonly used vegetable oil. For many people, castor oil is used as a home remedy for treatment of constipation, inflammation. On the other hand, according to some experts, one of the most promising advantages of castor eye is its ability to treat dry eyes. For example, you can just take pure castor oil in a clean dropper and administer one drop in each eye. This can be repeated to up to three to four times in a day. Anyway, you can just have a try.