I'm a post vitrectomy patient because of a retinal detachment. They inserted me a gas(I'm not sure if the gas is C3F8 I just heard the doctor said it).Few days after the surgery, I have a 40 and up IOP and the doctors give me a full dosage of medications including oral tablets but still can't get it lower. So they decided to implant me with a glaucoma drainage device to try to normalize my IOP. After the surgery, they get a 20 IOP and i thought it will get better but after 1 month of the surgery, my IOP dropped to zero and I noticed that my eye is sinking. (I don't know if they called that enopthalmos or hypotony). So I went back to the doctor and I undergo tube ligation and at the sametime conjunctivoplasty because the scleral patch is also exposed. The IOP gets normal again for a few weeks then after one month I suffered again from the same situation, zero IOP and sinking eye, and a little bit exposed tube. But this time they failed to increase my IOP, it is just hovering to 0-4 IOP. They decided to just observe me for about a month but still no changes in my IOP. So they decided to closed the tube and they use a nylon. It was somehow a success because the pressure increased to 18. It is almost a month ago now since that operation and I noticed that my vision has decrease in a big way compared to my vision few days after the surgery and the redness of my eye is getting worst. But I don't think I have a low or zero IOP cause when I try to close my eyes and touch it gently I can feel that it is hard compared to when I have zero IOP and sunken eye. My question is, it is really a right decision in the first place to implant a GDD on me because I really think that this all happen after they implanted me with that tube. Can you suggest anything about my situation because I really want to get the normal form of my eye. It has really deformed after that too many series of operation. My right eye is normal that's why I was able to write this. I hope it can get back to its normal form.