Modern microsurgical techniques for cataract removal are highly successful procedures. The few complications that exist are becoming even more remote, with newer developments in surgical techniques and anesthesia.
Some minor complications that can occur include a slight drooping of the eyelid, swelling around the eye, corneal haze, reflections or slight distortion from the lens implant, which are usually temporary. The chances for serious complications are negligible. Possible serious complications include infection, severe inflammation, and hemorrhage.
In a majority of cases these complications can be treated successfully or may resolve on their own with a good final restoration of vision. The above list is however not exhaustive.