Optometry & Vision Science

Skip Navigation LinksHome > October 2013 - Volume 90 - Issue 10 > The Relation Between Blinking and Conjunctival Folds and Dry...
Optometry & Vision Science:
doi: 10.1097/OPX.0000000000000029
Feature Article on Line

The Relation Between Blinking and Conjunctival Folds and Dry Eye Symptoms

Pult, Heiko*; Riede-Pult, Britta H.; Murphy, Paul J.

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Abstract

Purpose: To investigate the relationship between blink action, dry eye symptoms, and lid-parallel conjunctival folds (LIPCOF).

Methods: In 30 subjects (14 were women; mean [standard deviation {SD}] age, 42.4 [±12.3] years), spontaneous blinks were recorded from a temporal-inferior view (high-speed video), and the blink extent (incomplete [IC], almost complete [AC], and complete [CC]) was evaluated. Dry eye symptoms were evaluated using the Ocular Surface Disease Index (OSDI), and nasal and temporal LIPCOF grades were noted. Correlations between groups were calculated with Pearson correlation (or Spearman rank in nonparametric data), and differences between groups were calculated with an unpaired t-test (or U-test Mann-Whitney in nonparametric data).

Results: Blink rate was significantly higher in females (22.0% [±16.8]) than in males (8.6% [±7.2]; unpaired t-test: p = 0.007). The percentage of AC of all blinks (AC%) was significantly correlated to LIPCOF sum (nasal + temporal) and OSDI scores (r > 0.570, p < 0.001). The percentage of IC was significantly correlated to LIPCOF sum (r = −0.541, p < 0.001) but not to OSDI.

Conclusions: The frequency and type of blinking may have an effect on dry eye symptoms and LIPCOF severity since almost all complete blinks were significantly related to both factors.

© 2013 American Academy of Optometry

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