Thought to share my experience with those who are treated with 3 antibiotics. Recently it has been confirmed that my vision loss was due to a year treatment of 3 antibiotics. The culprit was Ethambutol. My vision gets a bit improvement about two months after stopping the treatment. Good to know that the process seems reversible. During treatment I have been monitored by a ophthalmologist, the problem was discovered at ~11 month treatment. Please note that not everyone will have this problem, please discuss with your doctor about this issue.