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- W1517231808 abstract "Background: This study was designed to investigate the influence of intravitreal indocyanine green (ICG) on retinal morphology and function. Methods: Brown Norway rats eyes (n=24) were vitrectomized by the injection of 0.05 ml of 100% SF6 gas. Two weeks later, ICG solution was injected into the vitreous cavity of vitrectomized eyes at a dose of 25 mg/ml, 2.5 mg/ml, 0.25 mg/ml or 0.025 mg/ml (0.05 ml/eye). Retinal toxicity was histologically assessed by light microscopy on day 10. The retinal function was also evaluated by electroretinography (ERG) in the low-dose groups (0.25 mg/ml and 0.025 mg/ml) after 10 days and again after 2 months,. Sham-operated eyes (SF6 injected followed by 0.05 ml of BSS plus, n=6) were used as controls. Results: In the high-dose group (25 mg/ml ICG), the retinal structure was severely deformed and the retinal pigment epithelium partly disappeared. In eyes with 2.5 mg/ml ICG, the retinal structure was also affected but less strongly so than with 25 mg/ml. No apparent pathologic change was observed in the low-dose groups (0.25 mg/ml or 0.025 mg/ml) by light microscopy. In contrast, 10 days later the amplitude of dark-adapted a- and b-waves of ERGs in the eyes of low-dose group rats were found to have decreased. In addition the light-adapted b-waves did not change significantly. These changes remained for 2 months. Conclusion: Even at a low dose (0.025 mg/ml), intravitreous ICG induced functional damage of the retina without any apparent morphological damage. This information should be taken into account when clinically administering ICG into the vitreous cavity." @default.
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- W1517231808 date "2002-12-01" @default.
- W1517231808 modified "2023-09-26" @default.
- W1517231808 title "Morphological and Functional Damage of the Retina Caused by Intravitreous Indocyanine Green in Rat Eyes" @default.
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