The goop doesn't go through a straw very well, and is stuck to the retina in places, so it has to be chopped up into bits with a saw similar to modern coal mining machines and sucked out a piece at a time. Then silicone fluid is installed, with an air bubble to keep pressure on the retina. Once everything calms down, if the retina doesn't tear or detach, and if the debris was successfully removed, vision may be better, or it may be a little blurry due to impurities in the fluid, distortion of the eyeball, or you might lose the eye entirely due to infection or retinal detachment. The general advice is don't poke holes in the eyeball and start stirring things around unless there is no other choice, and I can still shoot pretty well with a decent scope.