What condition results in the brown or black discoloration seen in feline corneas?

The condition responsible for the brown or black discoloration observed in feline corneas is indeed feline corneal sequestrum. This condition occurs when there is an area of necrotic corneal tissue that becomes discolored, typically due to a combination of factors, including chronic irritation, inflammation, or a previous corneal ulcer. The necrotic tissue can undergo pigmentary changes, leading to the characteristic dark coloration that is often seen in affected cats.

Feline corneal sequestrum is particularly common in certain breeds and can be associated with underlying issues such as feline herpesvirus. Treatment often involves surgical intervention to remove the sequestrum, along with addressing any underlying causes to prevent recurrence.

Understanding this condition is essential for effective diagnosis and treatment in veterinary ophthalmology, as the appearance of a corneal sequestrum can significantly impact the vision and comfort of the affected feline patient.