I think if you went to retina specialist that the specialist would have been able to identify if your issue is related to the retina whether it be a retinal hole, tear, detachment or possibly an epiretinal membrane (macular pucker) or some other retinal problem. Blurriness after a month seems too long and the flashes are concerning. I don't know if there's much you can do other than seeing another cataract surgeon and even another retinal surgeon because I wouldn't think after a month you should still be having these issues at all. The above comment referenced the YAG laser. A fairly common complication after cataract surgery is posterior capsular opacification (pco) where the person vision becomes off/blurry as if they have another cataract. However, while it can occur within weeks or shortly after cataract surgery, it typically happens a few years out if it happens at all. It doesn't seem that's the issue from your description of flashes but I'm not a MD and presumably your surgeons would have been able to indentify that issue if it existed. Hope you find a resolution to the problem and my best wishes.