What question did this study set out to answer?

To characterize age-related spectroscopic alterations and pigment formation across normal and cataractous human lenses to establish an optical classification system.

December 3, 2009Ophthalmic Research

Spectroscopic Evaluation and Classification of the Normal, Aging, and Cataractous Lens. (With 1 color plate)

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Authors

SLSidney LermanGeorgia Institute of Technology RBRaymond F. BorkmanUniversity of California, Riverside

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Implication

Spectroscopic analysis demonstrates age-dependent accumulation of tryptophan-derived fluorogens in human lenses, indicating distinct biochemical mechanisms between nuclear and cortical cataracts.

Key Points

To characterize age-related spectroscopic alterations and pigment formation across normal and cataractous human lenses to establish an optical classification system.
Examined normal human lenses spanning ages 1 day to 92 years alongside various primary cataractous lenses.
Performed fluorescence, ultraviolet, visible light transmission, and electron paramagnetic resonance (EPR) spectroscopy on lens nuclei and cortices.
Identified two fluorescent compounds originating from UV-induced free radical photo-degradation of tryptophan, with a 360 nm fluorogen causing nuclear yellowing by the second decade and a 435 nm secondary fluorogen linked to hazel-brown lens coloration.
Demonstrated marked elevation of both fluorogens in nuclear (brown) cataracts, whereas levels remained at or below normal in cortical cataracts.

Cite This Study

Lerman et al. (2009) studied this question.

synapsesocial.com/papers/6a8ba2a490fae8fd47e985c8 https://doi.org/10.1159/000264841

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Implication

Spectroscopic analysis demonstrates age-dependent accumulation of tryptophan-derived fluorogens in human lenses, indicating distinct biochemical mechanisms between nuclear and cortical cataracts.

Spectroscopic Evaluation and Classification of the Normal, Aging, and Cataractous Lens. (With 1 color plate)

Discussion

Member takes

Implication

Key Points

Cite This Study

Spectroscopic Evaluation and Classification of the Normal, Aging, and Cataractous Lens. (With 1 color plate)

Discussion

Member takes

Implication

Key Points

Cite This Study

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