There is no universally accepted quantitative metric that defines the ideal nasal tip rotation and projection.
To identify the ideal nasal tip projection (NTP) and rotation by using 3 classic NTP methods (Crumley 1, Crumley 2, and Goode).
Design, Setting, and Participants
JAMA Facial Plast Surg. Published online June 26, 2014. doi:10.1001/jamafacial.2014.228