Perhaps we will never be able to create an accurate list of those famous names who contributed to today's photographic lenses. But whoever they were, certainly they did create the "heart of the camera".
We carefully disassemble completely these lenses, remove the dirt and the old grease. Every single part is inspected and any minor imperfection is corrected. Then the repair process follows, then reassembly, realigning, collimation and testing that the manufacturer recommended. All this steps are done precisely and correctly for the perfect outcome.