Will getting a horizontal Canthoplasty and the opposite of a epicanthoplasty make close set eyes wider? (photos)

We can't make an epicanthal fold for you.  On the other hand, I think you would benefit from what I call a structured microblepharoplasty.  This is a very precise anchor blepharoplasty to refine the upper eyelid crease and the placement of the loose eyelid platform skin on slight stretch.  This helps support the upper eyelid lashes.  This is typically done with a small amount of ptosis correction to help open the eye.  The effect will be to brighten the eye.

Epicanthoplasty is not appropriate.I suspect you have  mild ptosis causing the appearance. I suggest you see a Plastic Surgeon who can assess if this is the case and recommend the right optionAll the best