My father suffers with yellowing of eyes after taking medicines for tuberculosis. Is it normal?

Hi doctor,

My father was diagnosed with PTB (pulmonary tuberculosis) last month. He is 64 years old. When I was a kid, my father used to smoke cigarettes a lot and got addicted to alcohol. He had these habits until 4 months. Now, he has stopped these habits. Now, he is under a treatment called directly observed therapy ("DOTS") in the nearby clinic. He is taking medicines for a month now. But this month, his eyes had become yellow and the right eye's vision has got blurred. I know about my father's eye vision which is found to be clear crystal even if he is old. I asked about the problems faced by the father to the nurse in the clinic. She advised stopping the medicines taken by my father and advised us to go for a check-up with a gastroenterologist. The doctor advised my father to get admitted for understanding the problem more. Because of the COVID pandemic, it is necessary to have a swab test. Before a month, my father did a swab test and it was negative. Today, he did the swab test again and it was negative. Currently, my father is not taking antitubercular medicines. Now, we are taking care of my father by giving him vitamins. He is taking enough sleep and rest now. Vitamin D is given from the sunlight every morning, with milk. He is taking lots of green veggies, and fruits with tons of water. My question is to know whether it is good to stop these medicines taken for tuberculosis. It is a week now that my father stopped taking medicines for tuberculosis.