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Related Experiment Video

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In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation
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Approach to Dry Eye in Video Display Terminal Workers (Basic Science).

Shigeru Nakamura1

  • 1Department of Ophthalmology, Keio University School of Medicine, Shinjyuku-ku, Tokyo, Japan.

Investigative Ophthalmology & Visual Science
|November 28, 2018
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Summary

A new animal model simulates dry eye in video display terminal (VDT) workers, revealing reduced blinking and lacrimal gland changes. Natural ingredient supplementation shows promise for relieving VDT-associated dry eye symptoms.

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Area of Science:

  • Ophthalmology
  • Animal Modeling
  • Cell Biology

Background:

  • Ubiquitous use of video display terminals (VDTs) has increased ocular discomfort, particularly dry eye, in workers.
  • Understanding the mechanisms of VDT-associated dry eye is crucial for developing effective treatments.

Purpose of the Study:

  • To create and validate an animal model for studying VDT-associated dry eye.
  • To investigate the pathological changes in the lacrimal gland.
  • To explore potential therapeutic interventions for VDT-associated dry eye.

Main Methods:

  • Developed a novel rat model involving swing placement and evaporative environment exposure to mimic VDT use.
  • Quantified blink frequency reduction compared to control groups.
  • Performed pathological analysis of lacrimal glands, assessing acinar cell number, size, and intracellular structure.

Main Results:

  • The VDT worker dry eye model demonstrated a significant reduction in blink frequency, similar to human VDT users.
  • Pathological findings included decreased tear secretion, reduced acinar cell number, and enlarged acinar cells with altered intracellular structure.
  • Oral supplementation with natural ingredients showed potential in alleviating dry eye symptoms within the model.

Conclusions:

  • The developed animal model effectively replicates key features of VDT-associated dry eye.
  • Lacrimal hypofunction, characterized by structural changes in the lacrimal gland, is implicated in VDT-associated dry eye.
  • Natural ingredient supplementation presents a promising therapeutic avenue for VDT-associated dry eye.