A comparative study of human lens by light scattering and scanning electron microscopy

Bettelheim, Frederick A.; Siew, E.L.; Shyne, Susan E.; Farnsworth, Patricia N.; Burke, Patricia A.

doi:10.1016/s0014-4835(81)80045-0

Cited by 8 publications

(1 citation statement)

References 6 publications

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“…The foregoing spectroscopic studies per formed on the normal human lenses confirm previously published data regarding the agerelated increase in nontryptophan lens fluo rescence and light scattering Ben-Sira et al, 1980;Bettelheim et al, 1981;Nishio et al, 1982].…”

Section: Discussionsupporting

confidence: 85%

Photographic and Spectroscopic Correlations of Human Cataracts

Lerman

Moran²,

Matthews³

1989

Ophthalmic Res

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Intracapsular cataracts obtained within 3 h after surgical extraction were photographed with the CCRG technique and immediately subjected to fluorescence spectroscopy followed by ³¹P- and ¹³C-nuclear magnetic resonance (NMR) spectroscopy. Fluorescence spectroscopy demonstrates an excellent correlation between nontryptophan fluorescence intensities and lens color. An interesting correlation was also observed between the degree of light scatter as determined by the 290-nm excitation peak for intrinsic lens tryptophan fluorescence and the CCRG (photographic) appearance of these cataractous lenses. Based on 100 cataracts analyzed, there is a strong correlation between this kind of light scattering measurement and the type and degree of lens opacification. A similar correlation is evident with the ³¹P-NMR organophosphate profiles in the lenses in which the sugar phosphate levels are elevated only in diabetic patients with cataracts (‘diabetic cataracts’). Aside from fluorescence and ³¹P-NMR spectroscopy, selected lenses were also incubated with 5.5 nM¹³C-glucose as soon as they were obtained, and the foregoing spectroscopy was performed, followed by ¹³C-NMR analyses to detect and monitor for sorbitol accumulation in young versus old normal lenses and in diabetic cataracts. These studies clearly demonstrate a direct correlation between nontryptophan-fluorescent chromophore levels, light scattering (determined by tryptophan excitation peaks), lens age and cataract type. In addition, the organophosphate profiles clearly delineate the diabetic cataracts, and the ¹³C-NMR spectra correlate well with the age-related decrease in aldose reductase activity

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Section: Discussionsupporting

confidence: 85%