There are several complications with the surgery as the followings: First, the inflammatory or infectious disease. Though it appears infrequently, such situation may lead to blurred vision and even more serious to go blind.
Second, with the intraocular implantation changed its location, which possibly result in metamorphopsia. For this condition, what you can only do is to do the second surgery in order to achieve the IOL reduction.
Third, you may suffer from the risk of retinal detachment.
Last, part of the patients' posterior capsule may appear to be vague, which we called as the after cataract.
In fact, however, you don't need worry too much. As you know, with the technology is so developed, trust the modern medical science as you can.