The main causes of heterochromia are as follows: A genetic drug-induced common drug used is topica; Prostaglandin analogues traumatic Blunt trauma Other causes are Congenital Horner’s acquires Horner’s SLE, Tuberculosis, Sarcoidosis, ps syndrome, Pigment dispersion syndrome, Iris nevus siderosis, Rubeosis iridis, Benign tumours of iris malignant melanoma, Albinism heterochronic, Cyclitis