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Related Experiment Videos

Corneal sensation in acute angle closure glaucoma.

B C Patel1, A B Tullo

  • 1Department of Ophthalmology, Manchester Royal Eye Hospital, England.

Acta Ophthalmologica
|February 1, 1988
PubMed
Summary

Acute angle closure glaucoma decreases corneal sensation. This reduction is detectable with specific tools and may partially recover when intraocular pressure normalizes.

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Area of Science:

  • Ophthalmology
  • Neuroscience

Background:

  • Acute angle closure glaucoma (AACG) is a serious ophthalmic condition characterized by a sudden increase in intraocular pressure.
  • Corneal sensation plays a crucial role in ocular surface health and protective reflexes.
  • The impact of AACG on corneal sensitivity requires further elucidation.

Purpose of the Study:

  • To investigate the changes in corneal sensation in patients diagnosed with acute angle closure glaucoma.
  • To compare the sensitivity differences based on the duration of the glaucoma episode.
  • To assess the potential for recovery of corneal sensation after intraocular pressure normalization.

Main Methods:

  • Corneal sensation was evaluated using the Cochet-Bonnet aesthesiometer and cotton wool testing.
  • Patients were categorized into two groups based on the duration of AACG symptoms (less than four days vs. longer history).
  • Intraocular pressure was monitored and normalized during the study period.

Main Results:

  • Corneal sensation was significantly decreased in eyes affected by acute angle closure glaucoma.
  • In recent cases (less than four days), sensitivity differences were only detected by the Cochet-Bonnet aesthesiometer.
  • Longer-standing AACG cases showed a more pronounced decrease in corneal sensation, detectable by both testing methods.
  • Partial recovery of corneal sensation was observed in both groups following normalization of intraocular pressure.

Conclusions:

  • Acute angle closure glaucoma leads to a measurable deficit in corneal sensation.
  • The severity of corneal sensory impairment correlates with the duration of the glaucoma episode.
  • Corneal sensitivity demonstrates a capacity for partial recovery after successful intraocular pressure management.

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