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Min Kyu Yang, Young Keun Han, Won Ryang Wee; Anterior chamber depth and refraction changes in late postoperative capsular block syndrome. Invest. Ophthalmol. Vis. Sci. 2014;55(13):2530.
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To assess the characteristic findings and effect of laser capsulotomy in cases of late postoperative capsular block syndrome (CBS).
Twenty seven patients diagnosed as late postoperative CBS between July 2010 and August 2013 were retrospectively reviewed. Before and 1 week after capsulotomy, anterior chamber depth (ACD) changes were assessed using ultrasound biomicroscopy (UBM) and IOLMaster. Changes of refractive status and UCVA (uncorrected visual acuity) were also measured at 1 week and 1 month after capsulotomy. For patients who received bilateral cataract surgery, preoperative ACD and axial length of both eyes were compared using IOLMaster.
Twenty five eyes of 23 patients who underwent laser capsulotomy showed a mean logMAR UCVA improvement of 0.31 ± 0.24 (range, 0.00-0.90). Mean ACD was increased by an average of 0.03 ± 0.05 mm (UBM, P = .035) and 0.72 ± 0.71 mm (IOLMaster, P = .011). Preoperative ACD was deeper in the eye with late postoperative CBS in all bilaterally pseudophakic patients (mean: 3.68 vs. 3.44 mm, P = .068).
Late postoperative CBS showed refractive changes which were resolved successfully after laser capsulotomy. Convex lens effect of opalescent material in distended capsular bag may play a major role in myopic shift. A greater preoperative ACD is possibly associated with the development of late postoperative CBS.
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