Our pet eyewash contains boric acid, zinc sulfate. It can effectively treat pet tearing and redness, itchy tears, eye drops, and other problems. Its use is simple: 1. Hold your pet's head close to the owner and lift it gently, 2. 2 to 3 drops per eye,3. Place eye drops on a cotton swab. 4. Gently wipe from the inside out to clean the eye area. It can keep pets clean and tidy.