I have a Labrador Retriever puppy who developed a condition known as Entropian Lower Eyelid. Its where the eye lid turns inside causing the eyelashes to rub the cornea and is extremely painful and will cause blindness. The condition is hereditary.I have been taking him to a vet since last September about every three weeks to get the lids tacked and this week finally the major operation to fix it. In total over $2,000 in expenses and all paid promptly and without any hassels. They are awsome!