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Related Experiment Videos

Decrease in corneal sensitivity and change in tear function in dry eye

K P Xu1, Y Yagi, K Tsubota

  • 1Department of Ophthalmology, Tokyo Dental College, Chiba, Japan.

Cornea
|May 1, 1996
PubMed
Summary
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Dry eye disease, characterized by insufficient tear secretion, significantly reduces corneal sensitivity. Early treatment is crucial to prevent damage and maintain the cornea's protective functions.

Area of Science:

  • Ophthalmology
  • Neuroscience

Background:

  • Dry eye disease is a common condition affecting tear production.
  • Corneal sensitivity plays a vital role in ocular surface health and protection.

Purpose of the Study:

  • To investigate the relationship between reduced tear secretion and diminished corneal sensitivity in dry eye patients.
  • To assess the impact of Sjögren's syndrome (SS) on this relationship.

Main Methods:

  • Corneal sensitivity was measured using the Cochet and Bonnet esthesiometer.
  • Tear secretion was evaluated via Schirmer test, tear clearance rate, and tear function index.
  • Ocular surface integrity was assessed using rose bengal and fluorescein staining.

Main Results:

Related Experiment Videos

  • Patients with dry eye (both non-SS and SS) exhibited significantly lower corneal sensitivity compared to healthy controls.
  • Corneal sensitivity showed significant correlations with Schirmer test values, tear function index, and staining scores.
  • Reduced tear secretion was associated with pathological changes in the corneal epithelium.

    • Conclusions:

    • Insufficient tear secretion in dry eye leads to decreased corneal sensitivity.
    • Maintaining adequate tear production is essential for preserving corneal nerve function and ocular surface integrity.
    • Prompt management of dry eye is recommended to prevent potential long-term corneal damage.