Also called corneal necrosis, keratitis black or corneal mummification. It corresponds to corneal stroma necrosis, which affects cats from 5 months to 17 years old. With the largest presentation in 2-year-old cats of Persian breeds, Himalayas, and long-haired cats, without gender predisposition. The pathogenesis is unclear, numerous factors have been established,the most important process of inflammatory.Other factors are entropion,trichiasis,lakefthalm,corneal ulcers, tear disruptions,herpesvirus and iatrogenic.Check with your veterinary doctor, in a timely manner.