My mother has renal TB, 5 years back she had taken normal TB treatment for 6 months and there was an stent in ureters for 6 months. After 6 months the doctor said their is still swelling in ureters so you need an operation. So we decided not to do any operation. My mother stopped all medicine. But their was some pain in right kidney continuously. So we decided to show again to an urologist in june. The doctor said your tb is still not cured. The doctor said we need to put stent again in right ureters and start again tb medicine. So now to condition is there is an stent and my mother is taking tb medicine from 6 july. The urologist referred to govt tb hospital for tb treatment. My mother is taking cat -2 treatment with streptomycin. She had taken 60 injection. And now she is having vision problem, so tb expert said you need to stop ethambutol. So we stopped ethambutol. So I want to ask to you sir, that, should we stop ethambutol or not.