The Variation with Age of the Spectral Transmissivity of the Living Human Crystalline Lens
- 1 January 1959
- journal article
- research article
- Published by S. Karger AG in Gerontology
- Vol. 3 (4) , 213-231
- https://doi.org/10.1159/000210900
Abstract
A description is given of an apparatus used for the measurement of the light transmission of the living crystalline lens. The underlying assumptions and theory are given, and it is found experimentally that the logarithm of the spectral transmissivity is constant between 4 and 20 years and then decreases linearly with age up to 63 years. Egyptian lenses are more absorbent by maximally 5%. The data are applied to the re-interpretation of visual phenomena, and a tentative suggestion is made to account for the age variation of the amplitude of accomodation.Keywords
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