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C Tello, HV Tran, RM Vessani, H Ishikawa, JM Liebmann, R Ritch; Ciliary Sulcus Appearance Following Laser Iridotomy (LI) in Relative Pupillary Block and in Plateau Iris Configuration . Invest. Ophthalmol. Vis. Sci. 2002;43(13):1075.
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Purpose: To assess and compare ultrasound biomicroscopic morphological changes of the ciliary sulcus and of the anterior chamber before and after LI in eyes with relative pupillary block (RPB) or plateau iris configuration (PIC). Methods: Consecutive eyes with RPB or with PIC confirmed by UBM scanned before and after LI were enrolled. The iridociliary relationship, changes in anterior chamber depth (ACD), angle recess area (ARA), and angle opening distance at 500µm (AOD) were assessed. Results: 21 eyes were enrolled (9 RPB, 11 PIC). In all eyes with RPB (mean age, 65.1 ± 8.3 (SD) years (range, 54 to 76); mean refractive error, +1.00 ± 2.25 diopters (range -1.5 to +5.25)) the ciliary sulcus was preserved following LI, while in all eyes with plateau iris configuration (mean age, 62.9 ± 12.7 (SD) years (range, 39 to 83); mean refractive error, +0.85 ± 1.7 diopters (range, -1.5 to +3.75)) iridociliary contact appeared following LI. In both group, quantitative UBM parameters increased following surgery (AOD (p<0.01), ARA (p<0.02), paired t-Test) except for ACD (p<0.001 (RPB), p=0.6 (PIC)). Conclusion: The ciliary sulcus is preserved following LI in eyes with relative pupillary block and disappears in eyes with plateau iris configuration.
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