Alar Base Reduction and Weir Technique Difference?

Nostril reduction surgery (called Alarplasty / Alar Base Reduction) is a procedure that can narrow the width of the nostril base, decrease the amount of nostril flaring, or decrease the size of the nostrils.
To accomplish this, the surgeon makes an incision in the crease where the nostril wall meets the cheek. A wedge shaped piece of nostril wall is removed, and when the incision is sewn closed, the nostril narrowing is acheived. The incision can be limited to the exterior part of the nostril wall (decreases flaring without making nostrils smaller) or extend into the nostril (to narrow the nostril base and make the nostrils smaller)
It is possible to perform this procedure alone or as part of a rhinoplasty. It can be performed alone, but keep in mind that in order for the nose to appear natural, it must adhere to certain proportions and also be in balance with the other facial features.
To get a better understanding of what your nose would look like after surgery, your prospective rhinoplasty surgeon should be able to show you before and after computer simulations. Many rhinoplasty surgeons use computer imaging, and recently 3D rhinoplasty imaging has become available. This allows patients to preview how their nose might look after surgery from any angle.

Alar base reduction (alarplasty) involves a curvilinear, comma incision along the entire alar facial groove around the side of the nostril. The Weir technique is an alarplasty technique where 3 to 4 mm of skin is removed from the bottom and the floor sill of the nose. Weir technique will both reduce the flare of the nostrils; however, the alar base reduction actually removes a portion of the alar lobule.

A Weir reduction is a specific type of alar base reduction technique. It is similar to saying a cadillac is a type of automobile. There are many different types of alar base reduction procedures. The specific procedure can be designed to make the nostrils, narrower, thinner, etc.