This mastiff has painful red eyes. What other lesions are visible on the ocular surface and what might this tell you about the diagnosis?
There is corneal pigmentation of substantial severity, which might well lead you to think that KCS was the diagnosis. But the pigmentationis on the inside of the cornea and not the outside and the intraocular pressures are in the high twenties even though the animal was referred treated with the topical carbonic anhydrase inhibitor Trusopt three times daily. This suggests that pigmentary glaucoma is a more likely differential as the Schirmer tear tests were over twenty millimitres of wetting in a minute. Pigmentary glaucoma is more commonly seen in the Cairn terrier but can occur in boxers and mastiffs. A useful reference is van de Sandtand colleagues (2003) Abnormal ocular pigment deposition and glaucoma in the dog. Veterinary Ophthalmology 6:273-278.
