Effect of eyelid saccades on the position of lateral canthus in young and older subjects

Antonio Augusto V. Cruz, Deborah B.Fernandes Távora, Luiz Fernando Taranta Martin

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To measure the effect of down and upgaze on lateral canthus height. Methods: Observational study. The lateral canthus height of 125 eyes was quantified in the primary position, up, and downgaze. All measurements were monocular. The sample comprised 125 subjects divided into three age groups: 10 to 30, 31 to 50, and 51 to 70 years. All images were acquired with a digital camera and processed with the NIH image software. Results: The lateral canthus height was influenced by both age and position of gaze. Compared to the primary position of gaze, the mean lateral canthus height decreased significantly in downgaze for all age groups (1.51 mm for group 1, 1.72 mm for group 2, and 2.3 mm for group 3). Upgaze increased the height of the lateral canthus only for groups 2, and 3 (0.66 mm and 0.87 mm, respectively). Conclusions: The height of the lateral canthus is strongly influenced by upper and lower eyelid movements. The combined action of contraction of the lower eyelid retractors and relaxation of the levator muscle diminishes the height of the lateral canthus in all age groups. This effect is more pronounced in older subjects, probably reflecting the typical lateral canthal tendon laxity of the aging process.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalOrbit
Volume27
Issue number1
DOIs
StatePublished - Jan 2008

Keywords

  • Aging
  • Eyelid saccades
  • Lateral canthus

ASJC Scopus subject areas

  • Ophthalmology

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