Orbicularis Oculi
The circular muscle around the eye responsible for eye crinkling during genuine smiles.
Activation of orbicularis oculi is the Duchenne marker — the key signal distinguishing genuine from social smiles in AI analysis.
See Also
Related Terms
Duchenne Smile
A genuine smile involving simultaneous activation of the zygomatic major (mouth) and orbicularis oculi (eyes).
Smize
Smiling with the eyes — a technique popularised by Tyra Banks for model photography.
Blendshape
A parametric facial deformation model that quantifies expression components like smile, brow raise, and eye squint.
Try our Smile Analyzer, Eye Shape Analyzer, Face Shape Analyzer, or Guess My Age.