الفهرس 
Acknowledgements
Late postoperative complicationsOnly 14 pages are availabe for public view
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Abstract
Trabeculectomy is the standard filtration procedure for glaucoma. This technique causes numerous and unpredictable postoperative complications. Deep sclerectomy with collagen implant (DSCI) was designed to lower the risk of these complications while retaining efficacy of trabeculectomy. The aim of this work is assessment of the success rate and the complications of deep sclerectomy with and without collagen implant versus standard trabeculectomy in treatment of primary open-angle glaucoma (POAG) using ultrasound biomicroscopy (UBM). In this study, 55 eyes from 39 patients with uncontrolled POAG, from outpatient clinic of ophthalmic center, Mansoura University, were subjected to a complete eye examination, including: visual acuity testing, slit-lamp biomicroscopy, gonioscopy, applanation tonometery, Funduscopy, fundus photography and automated perimetry. In the current study, the complete success rate was 80% at 6 months in DSCI group compared to other groups (68.1% in trabeculectomy group and 64.7% in DS group). The highest decrease in tension was in group I (39.223.3%) compared to the other groups. The effect of non-penetrating filtration surgery on visual acuity is minimal compared by trabeculectomy especially in the early postoperative period. The postoperative complication rate following DSCI was lower compared to trabeculectomy. UBM examination following SST showed low to medium bleb reflectivity in 18 eyes (81.8%) and high reflectivity in four eyes (18.2%). In 20 eyes (90.9%), the route under scleral flap was clearly visible by UBM. In 10 eyes (45.5%), the fluid-filled space was present. UBM examination following DS showed low to medium bleb reflectivity in 11 eyes (64.7%) and high reflectivity in six eyes (35.3%). Suprachoroidal hypoechoic areas were observed under the sclerectomy site in 2 eyes (11.8%). UBM examination following DSCI showed low to medium bleb reflectivity in 6 eyes (60%) and high reflectivity in four eyes (40%). Suprachoroidal hypoechoic areas were recorded in two eyes (20%). The collagen implant dissolved slowly, leaving a tunnel in the sclera and the thin trabeculo-Descemet’s membrane remained intact throughout follow-up period. Conclusion: The ability to identify a localized ciliary body detachment is possible only with UBM. It was a useful procedure in management of patients following trabeculectomy and NPFS.