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N T Yu, J F Kuck, C C Askren; Red fluorescence in older and brunescent human lenses.. Invest. Ophthalmol. Vis. Sci. 1979;18(12):1278-1280.
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Brunescent lenses and normal human lenses more than 70 years old exhibit red fluorescence due to a fluorophor with emission maximum at 672 nm under excitation by the 647.1 nm line of krypton ion laser. The properties and mode of occurrence of this fluorophor suggest that its formation is highly pertinent to senile nuclear pathology.
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