Would a canthoplasty help me achieve a slight lift in the corners of the eyes? (photos)

You have bilateral upper eyelid ptosis. When the canthus is reset with a canthoplasty, this can exacerbate the upper eyelid ptosis. For this reason, I generally recommend repairing the upper eyelid ptosis at the time the canthus is addressed. There are different types of canthoplasties. Canthopexy is a mild procedure that is done to tighten the muscular hammock of the lower eyelid and generally will not be powerful enough to accomplish what you need. A full lateral canthoplasty cuts the full thickness eyelid and generally the lower eyelid is shorten by the excision of eyelid tissue. This method is often used for reconstructive purposes. This type of canthoplasty is far more than you need and can disfigure you. Don't have such an aggressive procedure. There is an alternative called canthotomy sine canthotomy. This is a full strength canthoplasty without the destructive removal of the lower eyelid. For your needs it the right choice. There is no substitute for a detailed, in-person consultation. Your eyes can be your best feature.