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Abstract
The transport of fluorescein monoglucuronide, a fluorescent metabolite of fluorescein, from the vitreous was studied. Ten microliter of 1 mM fluorescein monoglucuronide or fluorescein solution was injected into the rabbit vitreous body, and the vitreous concentration was measured every 2 hr. The rate of loss from the vitreous was 0.066 +/- 0.012 (SD)/hour for fluorescein monoglucuronide and 0.22 +/- 0.029/hour for fluorescein. Systemically administered probenecid caused a statistically significant reduction in the loss from the vitreous of each of them.