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Mean rate of oxygen consumption (A) and mean ascorbate concentration (B) in vitreous samples obtained at the time of surgery. In patients who were undergoing their first vitrectomy, the gel status of the vitreous was scored on a 5-point scale. Vitreous that received a score of 3 or less had firmer gel; greater than 3, more liquid. *P>.05. †P<.001. ‡P<.01.
