These are the best eye drops EVER. I have been a contact wearer for almost a decade now, and I have tried many any eye drops trying to keep my eyes happy. These drops should be used on bare eyes, which is fine for me because I use them in the morning before I put my contacts in, as well as after I take them out at night.These drops cause a strong cooling sensation, which can be a surprise if you have never used drops with menthol in them before. I really enjoy this feeling, it's soothing and wakes my eyes up.These drops are not oily like tear replacement drops are. I like this because it allows me to do eye makeup directly following application of the drops because there is no oily residue on my tight line or water line. The 'cool redness relief' is my favorite version of the Rohto drops because you get all the benefits in one drop. It cools (but doesn't hurt like the "ice" version did for me) it soothes itchiness and helps diminish redness, and just generally feels nice when applied.I have gone through too many bottles to count. I always have these drops on hand!