Wouldn't it be better not to do a backtick unless it's really necessary?

My eyes are on the short side, so I was originally interested in double eyelid surgery, but
 when I went to get consultations, I was diagnosed that I needed anterior incision surgery more, which was different from what I expected. Maybe it's because my Mongolian folds are also thick...
 I was recommended an overall incisional blepharoplasty + anterior incision surgery a lot, but
 if I were to be greedy, I'd also like to get a posterior incision surgery, but I'm a little worried because of the side effects.
 If it's not absolutely necessary, is it better not to get it? I'm wondering if anterior incision surgery alone will solve my stuffy eyes...