Chin Reduction Technique Affects Changes That Can Be Done
There are numerous ways to do a chin reduction and how it is done will affect what dimensional changes can be done to the chin. The way you are describing it is an intraoral osteotomy technique which is really only good for shortening a vertically long chin. The submental chin reduction approach, which is the most common technique, can reduce both the horizontal and vertical dimensions of the chin and manage the excess soft tissues that are created all at the same time.
it is best to post a photo so one can help you with some information. You can cover the eyes etc so not to worry