Hi, the cataract can't return. A cataract surgery entails removal of the natural lens, the artificial lenses do not form cataracts, therefore a cataract cannot come back after surgery. If you feel blurred vision again, it's most likely a "posterior capsular opacification", the capsular was put in your eyes during the cataract surgery. It's easy to solve, the eye doctor will open a small hole in the capsular and the light comes in, you can see clearly. It's a simple clinic surgery, like in 5 minutes.