go to a tertiary eye centre where  all facilities  including physicians, anaesthesia, eye surgeon and icu etc are available. 1st get diabetes and nephropathy under control. because  then  only anaesthesia  can be given. operation  can be done  by any surgeon

If half of the surgery has been done by one doctor, he only is the one knows best about what has been done and what is best for the patient. Regarding the high creatinine level and high BP and blood sugar and whether to give anaesthesia in such situation or not, and what are the risk factors that has to be decided by the concerned anaesthesiologist. If the hospital has all the specialities including ICU, CCU and other facilities and the doctor is confident enough to say that the chances of surgery helping him are more than troubling him and anaesthetist is confident that during the duration of the surgery he can manage the vitals well, then there is no better place than the same hospital. If not, then you must go to the premiere institutes of India like RP Centre, AIIMS or Shankar Netralya,  etc.