Primary Retinal Detachment
Primary Retinal Detachment
Primary Retinal Detachment
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70<br />
reports, with a cumulative success rate of 97.4%.When PR fails, the<br />
most common second technique employed was SB; however, a<br />
number of patients undergo either pars plana vitrectomy (PPV)<br />
alone or PPV with SB.<br />
Visual (Functional) Results<br />
The functional results of PR reported in the literature vary widely,<br />
so that it is difficult to compare and summarize the data. For those<br />
patients with macula-involved detachments, final best-corrected<br />
visual acuity greater than or equal to 20/50 was achieved in between<br />
35% and 80% of cases. The wide variation in these numbers<br />
probably represents variation in the duration of macular detachment.<br />
Studies that categorized detachments of less than 2 weeks of<br />
macular involvement tended to have better outcome averages.<br />
Overall, most series reported averages for best-corrected visual<br />
acuity greater than or equal to 20/50 following macula-involving<br />
detachments to be about 65%.<br />
When examining the data for patients without preoperative<br />
detachment of the macula, 86% to 88% will have the same or improved<br />
best-corrected visual acuity [9, 13]. However, between 12%<br />
and 14% of patients will lose two or more lines of best-corrected<br />
visual acuity. Surgical failures and complications were the reason<br />
for vision loss in most instances.<br />
Reasons for Failure<br />
4 Pneumatic Retinopexy for <strong>Primary</strong> <strong>Retinal</strong> <strong>Detachment</strong><br />
The causes of anatomic failure following PR have been examined<br />
in several series [19, 30]. New retinal breaks are the most commonly<br />
cited reason for failure; however, missed pre-existing breaks are<br />
commonly grouped together because of the difficulty differentiating<br />
the two. New and/or missed breaks occur in between 7% and<br />
33% of reported cases [3, 9, 11–18] and account for 48% to 73% of