Are my breasts tuberous? What sort of surgery is there to fix them? (photos)

Thank you for the question and pictures.
 Hard to tell based on the photographs but (after careful review of the pictures), I think your breasts do demonstrate some of the qualities seen with very mildly tuberous (constricted) breasts; there is a wide range when it comes to tuberous/constricted breast presentation.  
Generally speaking, some of the characteristics seen with tuberous breasts include a very narrow base, short distance from areola to inframammary fold, tight (constricted) lower pole of the breasts, relatively wide space between the breasts, "puffy” areola and some degree of ptosis (drooping). 
Generally, correction of tuberous breast anomalies involves breast augmentation with areola reduction / mastopexy procedure. The distance from the inframammary fold is increased (to create a more rounded out appearance). Proper implant positioning improves the distance (cleavage) between the breasts. The areola reduction helps to treat the pointed and "puffy" appearance of the areola.
Regardless of the semantics, if the appearance/shape/size of the breasts are a concern, you may be an excellent candidate for breast surgery.  In your case specifically, the question is quite good ( although mild asymmetry, which is very common, is present).  The major feature present in your case is the larger and "puffy" areola which can be surgically  treated with an areola reduction procedure.
If/when you are ready, please make sure you consult with well experienced board-certified plastic surgeons who have significant (demonstrable) experience with this type of surgery.
 
 Best wishes. 

Tuberous breast is not, technically speaking, a "yes" or "no" question. There can be different points on the continuum. The typical hallmarks include a high, tight fold with "puffy" or distended areola, minimal breast tissue and potentially herniation of the breast tissue through a tightened ring thus the "tuberous" label. It is a congenital deformity which usually manifests at puberty. To what degree it manifests will vary from one patient to the next.
Treatment of tuberous breasts varies depending on the degree of the breast architectural distortion. Surgical correction typically involves:
-areolar reduction
-submuscular augmentation
-release of constricted breast tissue
All of these techniques work in concert to correct the tuberous deformation of the breast.Based upon your photos, you demonstrate a very mild form (if at all), with mild areolar distension and a shorter fold. You would likely benefit from an augmentation with areolar reduction.
As always, discuss your concerns with a board certified plastic surgeon (ABPS).
Donovan Rosas MD
Board Certified by the American Board of Plastic Surgery
Member: American Society for Aesthetic Plastic Surgery, American Society of Plastic Surgeons
RealSelf Top 100
RealSelf Hall of Fame

From the pictures posted, you do not seem to have tuberous breasts. I recommend an in person evaluation by a plastic surgeon to be measured and discuss your goals. After I measure and discuss goals with my patients, we then look at pictures of women with similar measurements with different size breast implants. My patients tell me that this process is very helpful in determining what size breast implant is right for them. 
Dr. Ted Eisenberg, Board Certified Plastic Surgeon and Author            RealSelf Distinguished Hall of Fame Inductee