Glacoma Vision improvement and decline

My vision improved after glaucoma surgery, but then my vision decreased again. Then the doctor ,pred fort drops My vision improved again, but since the doctor was unavailable, we went to Tirupati. The medicines they prescribed were only of limited help. I complained about the drops I had used in the past for the second time.Again, Ped Fort, and brio-b, lopres Drops were prescribed. My vision improved and then decreased again. But my eye pressure is normal, it is 13.15. I don't know what to do. Please give me some advice.