Our pet's eye wash contains boric acid, zinc sulfate. It can effectively treat pet tears and red and itchy tears, eye droppings and other problems. Its use is simple: 1. Hold the pet's head close to the owner and gently lift it up, 2. 2 to 3 drops per eye, 3. Apply eye drops to a cotton swab. 4. Wipe gently from the inside out to clean the eye area. And it can make pets clean and clean.