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The relationship between CPAP usage and corneal thickness.

Ethem Gelir1, Murat Timur Budak1, Sadik Ardıc2

  • 1Physiology Department, Hacettepe University Medical School, Ankara, Turkey.

Plos One
|January 30, 2014
PubMed
Summary
This summary is machine-generated.

Continuous positive airway pressure (CPAP) use is linked to stable corneal thickness during sleep in patients with sleep disordered breathing (SDB). CPAP may prevent corneal thickening, potentially improving oxygenation for SDB patients, especially those wearing contact lenses.

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Area of Science:

  • Ophthalmology
  • Sleep Medicine
  • Physiology

Background:

  • Sleep disordered breathing (SDB) affects many individuals, often associated with reduced Rapid Eye Movement (REM) sleep.
  • Reduced REM sleep may compromise corneal oxygenation, potentially impacting corneal health.
  • Corneal thickness changes during sleep are not well understood, particularly in the context of SDB.

Purpose of the Study:

  • To investigate the correlation between continuous positive airway pressure (CPAP) usage and changes in corneal thickness.
  • To assess the impact of CPAP on corneal health in patients diagnosed with sleep disordered breathing.
  • To explore potential links between sleep patterns, corneal thickness, and oxygenation.

Main Methods:

  • Corneal thickness was measured using ultrasonic pachymetry before sleep and after waking.
  • Visual acuity was assessed using a standard eye chart before and after sleep.
  • Polysomnography (PSG) was conducted to record sleep patterns, with participants divided into CPAP and non-CPAP groups.

Main Results:

  • Patients not using CPAP exhibited a significant increase in corneal thickness in both eyes during sleep.
  • Patients using CPAP showed no significant increase in corneal thickness during sleep.
  • No significant differences in visual acuity were observed between the CPAP and non-CPAP groups.

Conclusions:

  • CPAP usage appears to prevent the significant increase in corneal thickness observed during sleep in SDB patients.
  • Increased corneal thickness in non-CPAP users may indicate compromised corneal oxygenation, potentially linked to reduced REM sleep.
  • SDB patients, particularly those using contact lenses, require careful monitoring of corneal thickness due to potential oxygenation issues.