98% of patients do very well from the surgery. However, like any surgical procedure, complications can occur.
These complications include:

infection
inflammation – swelling and irritation of the eye immediately after the operation
haemorrhage in the eye
changing the pupil shape or size
droopiness of the upper eyelid
macular oedema (swelling of the retina, responsible for clear central vision) which may occur [...]

After the operation, there are no limitations on the patient. Usually two to three kinds of drops are required, each to be used three or four times a day after surgery to encourage healing and prevent infection. There are no particular restrictions upon activity except that any direct trauma to the eye would be highly [...]

The treatment the cataract is surgical removal of the clouded lens. The eye, however, cannot focus without a lens, so vision will be indistinct unless some device is employed to take the place of the missing lens. Since about 1980, we have achieved this by inserting a plastic lens into the eye (intraocular lens).
The cataract [...]