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Corneal sensitivity decreases with age, particularly in older adults, as measured by the Swiss liquid jet esthesiometer for corneal sensitivity (SLACS). General pain perception did not correlate with ocular surface sensation.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Gerontology

Background:

  • Corneal sensation is crucial for ocular surface health and protective reflexes.
  • Age-related changes in sensory perception are well-documented in various systems.
  • Understanding corneal sensitivity changes with age is important for diagnosing and managing ocular surface conditions.

Purpose of the Study:

  • To investigate whether corneal sensitivity decreases with age.
  • To determine if corneal sensitivity correlates with general pain perception.

Main Methods:

  • Prospective cross-sectional cohort study with two age groups: 18-30 years (Group A) and 50-70 years (Group B).
  • Corneal sensitivity threshold (CST) measured using the Swiss liquid jet esthesiometer for corneal sensitivity (SLACS) and Cochet-Bonnet (CB) esthesiometer.
  • General pain sensitivity score collected from all participants.

Main Results:

  • A statistically significant decrease in CST was observed in the older age group (Group B) using the SLACS (P < 0.001).
  • A trend towards decreased CST was noted with the CB esthesiometer in the older group, but it was not statistically significant.
  • No significant correlation was found between general pain scores and CST measurements from either esthesiometry method.

Conclusions:

  • Corneal sensitivity, particularly when measured with the SLACS, is reduced in older adults.
  • The findings suggest that age-related decline in corneal sensation is measurable.
  • General pain perception does not appear to be associated with ocular surface sensation in this cohort.