Batra Hospital — Complaint about a dr

My father, subash chandar vohra, bhmrc no: bh721650 was diagnosed with pleural effusion in the lungs. He consulted dr. Supreet batra, pulmonologist at batra hospital who admitted him for 9 days in the hospital and diagnosed the prob as :" granulomatous inflammation and termed this tb and gave medicine for tb for 6 months without explaning the side effects of the medicine. Each time he visited the dr at the opd he gave a casual approach to the prob. It was only after 3 months that his vision started getting lost due to combutol toxicity did the dr stop the med. Now my father has lost 90% of his vision due to the casual approach and carelessness of this dr who never told nathing abt the side effects of the med to an 80 yr old patient . Have shown at reputed eye hospitals like eye sciences and centre for sight who have rejected his case . I wish to put my grievance against such a dr and some action should be taken against him for the loss he has caused to my father due to side effect of the combutol med.