Your eye surgeon will give you specific instructions to follow before and after your procedure and will tell you what to expect during the procedure. The following guidelines apply to clear-corneal phacoemulsification, which is easier on the patient than other types of cataract surgery. Even for the same procedure, however, the routine can vary greatly from clinic to clinic and from doctor to doctor. If what you read in the paragraphs below differs from your doctor's instructions, follow your doctor's instructions.