Would lateral canthoplasty be the best option for my eyes? (Photo)

The question you pose is an interesting one.  It is normal for the lateral canthus to be elevated slightly higher than the medial canthus.  I would generally not recommend a canthoplasty unless absolutely necessary.  You may benefit from a conservative upper blepharoplasty.  However, based upon the pictures provided, I would not recommend canthoplasty surgery.

It would be helpful to see a full face picture, but it looks
like your upper eyelids have some excess skin. Removing
a small amount of skin from the upper eyelids might significantly improve
the appearance of the eyes. Sometimes brow lifting alone or
in conjunction with a conservative blepharoplasty will bring you the desired
correction. Brow lifting can be accomplished with a little Botox,
or sometimes filler. A trained oculofacial surgeon would be able to
determine the appropriate procedure for you.