B. R. V. O TREATMENT. I do pls suggest?

My mother is 58 years old and she is high BP patient and under allopathy treatment by senior physician. For last 1 year she is having eye problem in left eye. All the images from left eye is not properly visible. I went to retina Specialist doctor he suggested for OCT and after watching it dr diagnosed it as B.R.V.O . Dr said the treatment is only taking injection in eye and prescribed " ANTI VEG F" and said for atleast 3 injection once in month for 3 months regularly. I said him will injection benefit my mother, he said I can't say with confidence. (Cost of 1 injection is 17,000). I then went for suggestion with Two senior eye specialist (both having experience of more than 40 years as eye specialist') . They said taking injection will benefit patient is not certain. They said chances of positive results after taking injection is very less. What should I do pls suggest?