Right Capsulotomy Right Mastopexy (Periareolar) (Photo)

I am looking into getting surgery due to my right breast being different than my left. My doctor recommends what is in the title of this question. My right breast is not hard, but the implant sits high while the nipple sits lower. I have 390 CC saline implants under the muscle on both sides. Prior to surgery i had slight asymmetry. I have had the implants for almost 4 years. Again both breast feel the same, both soft. I do trust my surgeon just trying to understand his recommendation. Thank you.