What is the difference between Canthopexy vs. Canthoplasty? Which is better, more reliable, long lasting and safer?

There is a big difference between a canthopexy vs canthoplasty in cosmetic eyelid surgery.  I perform a lateral canthopexy in most cosmetic eyelid procedures as it is SAFE and does not permanently alter the eyelid shape as it merely tightens the out canthal ligament    It does not cut or elevate it in a different position as is done in a canthoplasty which is reserved for either reconstructive or complex eyelid malposition problems .    This is important to know before you have cosmetic eyelid surgery   See a true eyelid surgery expert that has expertise in this area which includes a board certified Plastic Surgeon , Facial Plastic Surgeon as well as a Oculoplastic Surgeon. 

A canthopexy is a canthal tendon tightening procedure that is performed with a stitch and does not require reconstruction of the lateral canthal tend.  Canthoplasty is a lateral canthal reconstruction that involves much more extensive surgery on these tissues.  Generally the canthal angle is split and typically the lower limb of the lateral canthal tendon is severed from the orbital rim.  The lower eyelid is shortened and a new lateral canthal angel is reformed with sutures.  Non-oculplastic surgeons generally to a poor job with the lateral canthoplasty.  This is a fussy surgery and it requires quite a bit of specialize training, skills, and experience to perform satisfactorily.  Properly done, a canthoplasty can last a life time.  Canthopexy, not so much.  The real key is why are you a candidate for canthal surgery?    

A canthopexy is elevation of the lateral can thus done for support without dividing it. A canthoplasty is similar however the lower lid lateral support is divided and shortened and supported superiorly for similar reasons. A canthoplasty can change the corner of the eye position and shorten the lower lid.