The functional results of PR reported in the literature vary widely, so that it is difficult to compare and summarize the data. For those patients with macula-involved detachments, final best-corrected visual acuity greater than or equal to 20/50 was achieved in between 35% and 80% of cases. The wide variation in these numbers probably represents variation in the duration of macular detachment. Studies that categorized detachments of less than 2 weeks of macular involvement tended to have better outcome averages. Overall, most series reported averages for best-corrected visual acuity greater than or equal to 20/50 following macula-involving detachments to be about 65%.
When examining the data for patients without preoperative detachment of the macula, 86% to 88% will have the same or improved best-corrected visual acuity [9,13]. However, between 12% and 14% of patients will lose two or more lines of best-corrected visual acuity. Surgical failures and complications were the reason for vision loss in most instances.
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