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Related Experiment Videos

Blinking patterns and corneal staining.

Michael J Collins1, D Robert Iskander, Alison Saunders

  • 1Contact Lens and Visual Optics Laboratory, School of Optometry, Queensland University of Technology, Kelvin Grove, Queensland, Australia. m.collins@qut.edu.au

Eye & Contact Lens
|November 14, 2006
PubMed
Summary
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Blinking patterns in soft contact lens wearers and healthy individuals reveal incomplete blinks are common. Incomplete blinking is linked to corneal staining, especially in soft contact lens wearers.

Area of Science:

  • Ophthalmology
  • Optometry
  • Corneal Physiology

Background:

  • Blinking is crucial for ocular surface health and tear film distribution.
  • Soft contact lens wear can alter normal blinking dynamics and ocular surface conditions.

Purpose of the Study:

  • To investigate blinking patterns in healthy subjects and soft contact lens wearers.
  • To determine the association between blinking characteristics and corneal fluorescein staining.

Main Methods:

  • High-speed filming captured natural blinking patterns in 15 soft contact lens wearers and 11 healthy subjects.
  • Custom software measured palpebral aperture and blink completeness.
  • Corneal fluorescein staining was quantified on a 0-4 scale.

Main Results:

Related Experiment Videos

  • 22% of blinks were incomplete (<2/3 open aperture) in both groups.
  • A significant correlation (r=0.40) was found between mean closed palpebral aperture and corneal staining in soft contact lens wearers.
  • The distribution of closed palpebral apertures differed significantly between subjects with and without corneal staining in both groups.

Conclusions:

  • No clear distinction in blink completeness was observed between healthy and soft contact lens wearers.
  • An association exists between incomplete blinking (mean closed palpebral aperture) and corneal staining in both groups.
  • This association is more pronounced in soft contact lens wearers.