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Heterochromia iridis in water buffaloes (Bubalus bubalis)
N.A. Misk1, M.A. Semieka, A. Fathy
1Department of Veterinary Surgery, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt; Department of Veterinary Surgery, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt; Department of Veterinary Surgery, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.
Abstract:
This study included 45 unaffected animals and 593 animals affected with heterochromia irides, and 85 enucleated eyeballs with heterochromia irides. The classification of heterochromia irides, morphology of normal and heterochromic irides, and the histology, ultrastructure, and scanning electron microscopy are presented. The incidence of heterochromia irides in water buffaloes was 7.62% affecting either one or both eyes. Both complete and partial heterochromia irides occurred. Complete heterochromia iridis is more frequent than the partial form in either bilateral or unilateral cases. The pupil has a dumb-bell-shape appearance. Granula iridica occurred at the upper (100%) and lower (30%) pupillary margins and originated from the posterior pigmented epithelium. In heterochromia irides, the melanocytes is absent in the anterior border and stromal layers, and iridal thickness appeared thinner than that of normal eyes.