The corneal sequestrum is a specific affection of the cat for which the diagnosis is often easy. Indeed, the sequestrum presents itself as a round black or brown corneal opacity.
This disease is often seen in Persian, Siamese, and Burmese cats. We can also see it on European cats.
Although many theories were put forth, the exact cause of this affection is not clearly determined.
The size of the sequestrum can vary (from very little to very large), and the mean diameter is of 5 mm. The shape of the sequestrum is usually round, but it can be very irregular.
The surgical treatment of the corneal sequestrum by a superficial keratectomy can offer good results. The technique consists in taking out the superficial part of the pathological cornea.
The prognosis after the surgical treatment of the corneal sequestrum is good. However, relapses, though rare, are sometimes possible.
The correction of potential ocular disorders associated, such as the entropion, the keratoconjunctivitis sicca, or trichiasis allows to reduce the risk of relapse.
The prescription of artificial tears on the long term can help prevent possible relapses by protecting the surface of the cornea.