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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Related Experiment Video

Updated: Sep 6, 2025

Intense Pulsed Light for the Treatment of Dry Eye Owing to Meibomian Gland Dysfunction
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Neurostimulation for dry eye disease.

Nir Erdinest1, Shirley Pincovich2, Naomi London3

  • 1Department of Ophthalmology, Hadassah-Hebrew University Medical Center, Jerusalem.

Current Opinion in Allergy and Clinical Immunology
|July 2, 2022
PubMed
Summary

Neurostimulation offers a novel approach to managing dry eye disease (DED) by stimulating tear production. This method effectively improves DED symptoms and tear volume through nerve stimulation.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Tear Physiology

Background:

  • Current dry eye disease (DED) treatments focus on tear supplementation and inflammation reduction.
  • Neurostimulation presents a novel therapeutic strategy targeting the underlying cause of DED by enhancing natural tear production.
  • Understanding the neuroanatomy of the lacrimal unit is crucial for developing effective neurostimulation therapies.

Purpose of the Study:

  • To review the neuroanatomy and physiology of basal and reflex tearing.
  • To present current and emerging neurostimulation therapies for DED management.
  • To explore the potential of neurostimulation in addressing DED pathophysiology.

Main Methods:

  • Review of existing literature on neuroanatomy, physiology, and neurostimulation techniques for DED.
  • Analysis of research demonstrating the effects of neurostimulation on lacrimal, goblet cell, and meibomian gland function.
  • Evaluation of clinical outcomes, including subjective symptom improvement and objective measures of tear production.

Main Results:

  • Neurostimulation can stimulate lacrimal glands, goblet cells, and meibomian glands.
  • Various stimulation modes (electrical, magnetic, chemical) are being explored.
  • Clinical studies show neurostimulation improves DED signs and symptoms by increasing basal tear production and volume.

Conclusions:

  • Neurostimulation is a promising, safe, and well-tolerated therapeutic approach for DED.
  • Stimulating the sensory trigeminal nerves offers a pathway to enhance tear film.
  • This approach targets the root cause of DED by boosting endogenous tear production.