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T. Rowe, A. Artsyukhovich; A Calculation of the Effect on Aphakic Hazard Function by Spectrally Modifying Various Ophthalmic Illumination Sources . Invest. Ophthalmol. Vis. Sci. 2003;44(13):3034.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the theoretical retinal hazard for ophthalmic endo-illuminators employing different light sources - Xe short arc, Metal-Halide arc and Tungsten Halogen lamps. Methods: The Aphakic Hazard Function was calculated based on the spectra from the above-mentioned sources according to function defined within International Standard ISO 15752: 2000(E) "Ophthalmic Instruments - Endoilluminators - Fundamental Requirements and Test Methods for Optical Radiation Safety". Various UV-Blue wavelength blocking filters were then applied to evaluate their relative effect on the function. Results: We measured the spectra for a number of commercially available ophthalmic endoilluminators. We demonstrate that unaltered spectra from Xe and Metal-Halide sources significantly increase the Aphakic Hazard Function as compared to tungsten Halogen sources. However, commercially available integrated UV-Blue blocking filters mitigate the hazard to varying degrees. The standard recommends that the energy in the range of the spectrum below 420nm be attenuated as much as possible. Conclusions: UV-Blue wavelength blocking filters significantly lower the theoretical Aphakic Retinal Hazard. The use and specification of these filters is particularly critical for the short-arc Xe and Metal-Halide sources.
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