Buffering capacity of bovine vitreous.

Purpose: To measure the buffering capacity of bovine vitreous to HCl, NaOH, and triamcinolone acetonide.

Methods: Vitreous was dissected from 10 bovine globes, homogenized, and divided into 5.0-mL aliquots.

Intravitreal toxicity of levofloxacin and gatifloxacin.

Background And Objective: To assess the retinal toxicity of varying concentrations of intravitreally injected gatifloxacin and levofloxacin.

Materials And Methods: In this experimental, controlled study, levofloxacin (initial concentration = 25 mg/mL) and gatifloxacin (initial concentration = 2 mg/mL) were titrated using 5% dextrose solution to concentrations of 2,500 to 156 microg/0.1 mL and 400 to 50 microg/0.