Simons Method

The Simons Method is one approach used to evaluate nasal tip projection in facial analysis.¹
This states that the basal length of the nose should approximately equal the height of the upper lip.
- The basal length of the nose is measured from the subnasale to the nasal tip.
- The height of the upper lip is measured from the subnasale to the upper lip vermillion.
Although this approach is easy to use, there can be inaccurate results because the height of the upper lip can be variable.²³

Simons method for evaluating nasal tip projection

Methods for assessment of tip projection
	Goode Method Nasal length is measured from nasion (N) to tip (T). A second line is drawn from the nasion (N) to the alar crease (AC) Nasal projection is measured using a perpendicular line from N-AC that passes through the nasal tip (T) The ideal ratio between nasal projection and nasal length is *0.55-0.6 : 1*
	Powell and Humphreys Method Nasal height is measured from nasion (N) to subnasale (Sn). Tip projection is measured using a perpendicular line from N-Sn that passes through th e nasal tip. The ideal ratio between nasal height and tip projection is *2.8 : 1*
	Simons Method Basal length is measured from subnasale (Sn) to the nasal tip (T). Upper lip height is measured from subnasale (Sn) to vermillion border (V) The basal length and upper lip height should be approximately equal.
	Crumley and Lanser Method Nasal length is measured from nasion (N) to tip (T). A second line is drawn from the nasion (N) to the alar crease (AC) Nasal projection is measured using a perpendicular line from N-AC that passes through the nasal tip (T) The right angle triangle formed by the above 3 lines should ideally have a *3:4:5 ratio*

Methods for assessment of nasal tip projection: Goode method, Powell and Humphreys Method, Simons Method, Crumley and Lanser Method

Simons, R. L. “Nasal tip projection, ptosis and supratip thickening.” (1982). ↩
Crumley, Roger L., and Michael Lanser. “Quantitative analysis of nasal tip projection.” The Laryngoscope 98.2 (1988): 202-208. ↩
Bailey, Byron J., et al. “Chapter 170: Preoperative Evaluation and Facial Analysis in Facial Plastic Surgery.pdf.” Bailey’s Head and Neck Surgery - Otolaryngology, 5th ed., Wolters Kluwer, Lippincott Williams Et Wilkins, 2014. ↩

Last updated December 10, 2022