Well, first you should know that supplementation with fish oil could be effective so it will just help treat dry eyes. And of course, you can just take some fish oil products. And just apply them over your eye skin surface. And let the oil just cover the eye skin. That can be enough. And do not put too much on your eyes, or it will just waste it. Also, you can just have more herring and salmon too. For dry eyes, discomfort, including irritation, burning, grittiness, redness, tearing, and blurred vision can be possible. So you should just be careful about it. By the way, more water and eat more fruits should be kept too.