How can I get rid of a negative canthal tilt? (Photo)

It is important to understand that canthoplasty by itself is not the correct treatment. Rather, the lower eyelids need to be raised in addition to the lateral canthus, in order to have long-lasting natural eye shape. That is lower eyelid retraction surgery with canthoplasty to makes eyes more almond shaped with neutral or positive canthal tilt.

You have not mentioned your age. Although from the photograph it seems that you only have negative tilt without associated ageing changes in the lower or upper eyelid.  If that is the case lateral canthopexy to lift up the outer corner of your eye will most likely help you. Of course all this is subject to actual finding on in person evaluation.  

Thank you for your question and photo.  A negative canthal tilt can be corrected with a surgery known as a canthoplasty or canthopexy.  If there is laxity of the lower eyelid, this can be corrected at the same time using a procedure called ectropion repair.  This procedure can often be done in the office under local anesthesia.  An in-person consultation with a board-certified oculoplastic surgeon can help to provide more detailed information.