Correlation between Intraocular Pressure Fluctuation with Postural Change and Postoperative Intraocular Pressure in Relation to the Time Course after Trabeculectomy

Background: to investigate the correlation between intraocular pressure (iop) fluctuation with postural change and iop in relation to the time course after trabeculectomy. methods: a total of 29 patients who had previously undergone primary trabeculectomy with mitomycin c were examined. iop was obtained at 1,2,3,6,and 12 months and then every 6 months postoperatively. results: the postural iop difference before surgery was 3.0 ± 1.8 mmhg,which was reduced to 0.9 ± 1.1 mmhg at 1 month,1.0 ± 1.0 mmhg at 2 months,1.3 ± 2.0 mmhg at 3 months,1.3 ± 1.4 mmhg at 6 months,1.4 ± 1.5 mmhg at 12 months,and 1.1 ± 0.7 mmhg at 18 months after trabeculectomy (p < 0.01 each visit). the filtering surgery failed in 7 out of 29 eyes. postural iop changes were less than 3 mmhg in those patients who did not require needle revision at every visit. however,in patients who did require needle revision,the increase in the posture-induced iop was greater than 3 mmhg prior to the increase in the sitting position iop. conclusions: assessment of postural iop changes after trabeculectomy might be potentially useful for predicting iop changes after trabeculectomy. © 2014 kazuyuki hirooka et al.