January 1999
Volume 40, Issue 1
Free
Articles  |   January 1999
Lenticular fluorescence as a poisson process.
Author Affiliations
  • R A Weale
    Age Concern Institute of Gerontology, King's College, London, United Kingdom.
Investigative Ophthalmology & Visual Science January 1999, Vol.40, 257-260. doi:
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      R A Weale; Lenticular fluorescence as a poisson process.. Invest. Ophthalmol. Vis. Sci. 1999;40(1):257-260.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

PURPOSE: To determine whether published data on lenticular fluorescence can be described in terms of the Poisson statistic. METHODS: The intensity of the Poisson function is expressed in terms of estimates of the fraction of the incident light absorbed by the human lens. Functions calculated for ages 0 to 80 years for probabilities of different numbers of quanta absorbed are compared with experimental results. RESULTS: To account for the observed data, a minimum of three exciting quanta (490 nm) absorbed has to be postulated for young lenses, but only two for older ones. At shorter wavelengths (380-450 nm), the tentative corresponding values are five and three, respectively. CONCLUSIONS: The model based on the age-related and wavelength-dependent changes in the minimum number of quanta absorbed from five to two is consistent with an age-related increase in the number of fluorophores and in their conformational changes.

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