Well, yes, mineral oil can be good for dry eyes. By using the products which are made of mineral oil, it can keep the eye moist, help to protect the eye from injury and infection, and decrease symptoms of dry eyes such as burning, itching, and feeling as if something is in the eye. Anyway, it is very effective for the dry eyes. Of course, it does not only relieve dry eyes, it can also do a good job to the skin. So there are many people using it. Besides, you should know that common causes for dry eyes include wind, sun, heating, air conditioning, computer use or reading, and certain medications. So you need to find out the real reason of your dry eyes, so that you can avoid it and heal the dry eyes.