lens shifting

I had cataract surgery two years ago it had my right eye covered after surgery the pain was severe and I couldn't stop vomiting the next day the doctor seen me and put some drops in my eye and told me my eye pressures were low that's why I was vomiting he took the patch off from the start I told him that there was an awful glare in the eye with the new lens.i knew something wasn't right he told me that it was ok.he was going to have to do the other eye but told me he would see me in six months my vision worsened and two years later my retina detached the retinal surgeon told me my lens shifted during cataract surgery what did that surgeon do or not do to cause this