Ultraviolet light exposure and its penetrance through the eye in a porcine model
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Natalie A. Afshari. 9415 Campus Point Dr, La Jolla, CA 92093, USA. naafshari@health.ucsd.edu

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Supported by Research to Prevent Blindness, New York, NY, USA.

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    Abstract:

    AIM: To determine the amount of ultraviolet (UV) light irradiance that various layers of the eye receive as sunlight passes through the eye, and to investigate the protective benefits of UV light-blocking contact lenses. METHODS: Twenty-four porcine eyes were prepared in one of three ways: isolated cornea, cornea and lens together, or whole eye preparation. UV light irradiance was measured with a UV-A/B light meter before and after the eye preparations were placed over the meter to measure UV light penetration in each eye structure. In the whole eye preparation, a hole was placed in the fovea to measure light as it passed through the vitreous. Subsequently, UV-protective contact lenses were placed over the structures, and UV light penetrance was measured. Measurements of UV light exposure were taken outdoors at various locations and times. RESULTS: Cornea absorbed 63.56% of UV light that reached the eye. Cornea and lens absorbed 99.34% of UV light. Whole eye absorbed 99.77% of UV light. When UV-protective contact lenses were placed, absorption was 98.90%, 99.55%, and 99.87%, respectively. UV light exposure was dependent on directionality and time of day, and was greatest in areas of high albedo that reflect significant amounts of light, such as a beach. CONCLUSION: Cornea absorbs the majority of UV light that reaches the eye in this model. UV-protective contact lenses reduce UV exposure to the eye. Locations with high albedo expose the eye to higher levels of UV light.

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Hideki Fukuoka, Helena E. Gali, Jennifer J. Bu, et al. Ultraviolet light exposure and its penetrance through the eye in a porcine model. Int J Ophthalmol, 2023,16(2):172-177

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Publication History
  • Received:June 06,2022
  • Revised:December 14,2022
  • Adopted:
  • Online: February 02,2023
  • Published: