Laser vision correction procedures differ in a number of ways, but conventional treatments use the same formula to treat every person with the same optical prescription. The Allegretto Wave, however, was conceived from the start to perform custom treatments and incorporates wavefront technology principles into each procedure while adjusting each treatment to the patient’s individual cornea.Laser vision correction procedures differ in a number of ways, but conventional treatments use the same formula to treat every person with the same optical prescription. The Allegretto Wave, however, was conceived from the start to perform custom treatments and incorporates wavefront technology principles into each procedure while adjusting each treatment to the patient’s individual cornea.