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Related Experiment Videos

Phototoxicity and the cornea.

O D Schein1

  • 1Massachusetts Eye and Ear Infirmary, Boston.

Journal of the National Medical Association
|July 1, 1992
PubMed
Summary

Ultraviolet (UV) light can harm the cornea, causing temporary keratitis or chronic ocular surface issues. However, UV light also has therapeutic uses in refractive surgery, and UV-blocking lenses offer protection.

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Area of Science:

  • Ophthalmology
  • Photobiology
  • Corneal Science

Background:

  • The cornea is highly sensitive to ultraviolet (UV) light, leading to potential acute and chronic toxicity.
  • UV exposure can cause ultraviolet keratitis, a condition typically resolving within 72 hours, and chronic ocular surface abnormalities.

Purpose of the Study:

  • To review the effects of UV light on the cornea, including its damaging and therapeutic applications.
  • To highlight the risks of UV exposure and the availability of protective measures.

Main Methods:

  • Literature review of UV light effects on ocular tissues.
  • Discussion of clinical manifestations of UV keratitis and chronic UV damage.
  • Examination of therapeutic uses of UV light in ophthalmology, specifically excimer laser surgery.

Main Results:

  • Acute UV exposure can cause reversible ultraviolet keratitis.
  • Chronic UV exposure may result in persistent ocular surface abnormalities.
  • Excimer laser technology utilizes UV light's photoablative properties for corneal refractive surgery.

Conclusions:

  • The cornea's susceptibility to UV-induced photochemical injury necessitates protective measures.
  • UV-blocking lenses are effective in preventing UV-related corneal damage.
  • UV light presents a dual role in ophthalmology: a cause of toxicity and a tool for therapy.

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