Innovative, preservative-free formula in a multi-dose bottle. It also relieves Lasik dryness. If used for the dryness and discomfort associated with Lasik, follow your eye doctor's instructions. Relieves discomfort from dry and irritated eyes. Patented multi-dose bottle with a double locking system that keeps drops sterile and is designed to provide one consistent drop, every time. It has hydrocellular technology that allows hydration and maintains the volume of cells on the ocular surface.