Inclusion Criteria:  Age between 18 an 90 years Patients implanted with trifocal diffractive intraocular lenses Availability and motivation to perform the visual training assigned  Exclusion Criteria:  Age under 18 or over 90 years Presence of irregular cornea, illiteracy or cognitive impairment History of eye surgery or presence of any active ocular disease Intraoperative complications leading to significant visual sequelae Patients implanted with monofocal, extended depth of focus or refractive multifocal IOLs