Limbal ring

A limbal ring is a dark ring around the iris of the eye. It is a dark-colored manifestation of the corneal limbus resulting from optical properties of the region.[1]

Not to be confused with Kayser–Fleischer ring or Fleischer ring.
Blue eye with limbal ring
A human eye with prominent limbal ring

It has been suggested that limbal ring thickness may correlate with health or youthfulness and may contribute to facial attractiveness.[2][3] Some contact lenses are colored to simulate limbal rings.

See also

References
  1. Shyu, Betsy P.; Wyatt, Harry J. (2009). "Appearance of the Human Eye: Optical Contributions to the 'Limbal Ring'". Optometry and Vision Science. 86 (9): E1069–77. doi:10.1097/OPX.0b013e3181b4f010. PMID 19648842.
  2. Peshek, Semmaknejad, Hoffman, Foley (2011). "Preliminary evidence that the limbal ring influences facial attractiveness" (PDF). Evolutionary Psychology. 9 (2): 137–146. doi:10.1177/147470491100900201.CS1 maint: uses authors parameter (link)
  3. Brown M, Sacco DF (2017). "Put a (Limbal) Ring on It: Women Perceive Men's Limbal Rings as a Health Cue in Short-Term Mating Domains". Pers Soc Psychol Bull. 44 (1): 80–91. doi:10.1177/0146167217733072. PMID 28978250.
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