Xailin HA Eye Drops Xailin HA Eye Drops alleviate the symptoms of moderate to severe dry eye sensations such as soreness, irritation of a gritty sensation. They contain hyaluornic acid to lubricate & protect the eye, providing soothing relief from dry eyes. Xailin HA Eye Drops are preservative free in the eye. The preservative used turns into water & oxygen upon contact with the eye, thereby minimising the irritation that may be caused by traditional preservatives while still providing the convenience of a multidose form. Xailin HA Eye Drops can be used by contact lens wearers.