Our canine lacrimal serum contains vitamins, carotene and lycopene. It can protect pets' eyes, effectively treat pet tears and tear redness and itching, eye stool increase and other problems. The way to use it is simple: first fix the pet's head towards the owner, and slightly lift each eye to drop 2-3 drops onto the eye. After use, it helps to maintain pet eyes, relieve pet eye fatigue, and make pet eyes more lively.