Should I get lateral canthoplasty and epicanthoplasty to get larger eyes with less slant? Already have double eyelids (Photo)

First of all your eyes look too round. This occurs here because your eye's vertical measurement is much larger than the horizontal one. I believe this imbalance can be improved by medial epicanthoplasty. The procedure will allow you to choose from either a tapered or parallel crease; you will most likely benefit more from the latter option. If you widen the crease on the inner half and maintain the outer crease's current size, you eyes will appear more balanced. Yet, I caution you to not get too big of crease, since this will only make your eyes seem even rounder.
Regards,

Dr. Andrew Choi

Hello! You have round shaped eyes and would like them to be more almond shaped like the celebrities in the photos.  Medial epicanthoplasty would make the biggest difference in your case, and lateral canthoplasty would elongate your eyes further but the result would be more subtle.  Please consult with board-certified plastic surgeons who are familiar with such adjunctive eyelid procedures.  Good luck!

Raising the lower eyelids will give more almond shaped eyes rather than rounded eyes. It is important to note that is NOT just canthoplasty. 

You have pre-existing double eyelids, but you have some weakness in the muscle that opens the eyelid, as evidenced by your need to raise your brow and the downward slant of your eyelashes. Correction of this condition (ptosis) will relax you forehead and give you a more rested and less surprised appearance, as well as increasing the vertical dimension of your eye. A medial epicanthoplasty will also increase the visibility of the whites of your eye. A lateral canthoplasty works best on patients with a significant upward tilt to the eyes, which I do not observe in your case, so I would not recommend it.

Morning, I think at your young age the lateral canthoplasty will have little to no effect on your outcome.  However, for the medial aspect you could do a release-and-swing canthoplasty while extending your tapered crease to be a subtle parallel or open-tapered crease to give the eyes a more open and elliptical look.  Ptosis correction might be in order for you as well.  All that being said, be careful how "big" you make your crease because your eyes will look more round, not less.Chase Lay MDAsian eyelid surgery expert