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Keratitis solaris and sunbeds

F Daxecker1, M Blumthaler, W Ambach

  • 1University Clinic for Ophthalmology, University of Innsbruck, Austria.

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|January 1, 1995
PubMed
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Sunbeds can cause keratitis solaris, an eye condition from UV radiation. Exposure times vary widely, posing risks if protective eyewear isn't used, as users cannot determine safe tanning durations.

Area of Science:

  • Ophthalmology
  • Photobiology
  • Dermatology

Background:

  • Keratitis solaris is an eye condition caused by ultraviolet (UV) radiation exposure.
  • The threshold dose for UV-induced keratitis solaris is established at 40 J/m² for short-term exposure.
  • Understanding UV emission spectra from artificial sources is crucial for eye safety.

Purpose of the Study:

  • To measure the UV emission spectra of commercial sunbeds.
  • To calculate the exposure times required to reach the threshold dose for keratitis solaris.
  • To assess the risk of developing keratitis solaris from sunbed use.

Main Methods:

  • Emission spectra of 22 sunbeds were measured using a high-resolution double monochromator.
  • Measurements covered the UV and visible light range from 250 nm to 500 nm.

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  • Calculations determined exposure durations corresponding to the keratitis solaris threshold dose.

    • Main Results:

    • Calculated sunbed exposure times for keratitis solaris ranged from 90 seconds to 3.5 hours.
    • Shorter exposure times were associated with specific lamp types.
    • Risk of keratitis solaris increases without protective eyewear, especially with brief eye openings.

    Conclusions:

    • Sunbed users lack information on lamp types and emission spectra to determine safe exposure times.
    • Inadequate protective measures (e.g., goggles) during sunbed use can lead to keratitis solaris.
    • Variable sunbed UV output necessitates user awareness and potentially regulatory oversight for eye protection.