Purpose: This study aimed to evaluate the safety and efficacy of same-site Deep Sclerectomy (DS) re-operation with subconjunctival and subscleral collagen matrix (Ologen™) and minimal use of mitomycin C in cases of late failure blebs. Methods: A prospective evaluation of consecutive patients on which same-site DS was performed with subconjunctival and subscleral collagen matrix (Ologen™) and minimal use of mitomycin C; all performed at a single university institution. Intraocular pressure (IOP), number of glaucoma medications, postoperative interventions, postoperative complications and surgical success were registered at 24 hours, 1, 6 and 12 months after the surgery. Results: Twenty-five eyes of 25 patients were included in this study. Time from first DS was 55.08 ± 28.16 months. Mean preoperative IOP was 20.88 ± 6.06 mmHg and it was reduced to 16.64 ± 4.02 mmHg, at 12 months after re-operation (p 0,007). At this final visit, requirements for topical medications dropped from a mean of 2.2 ± 1.0 to 0.72 ± 1.0 per patient and no medications were required in 60% of patients. Success was 36 % in criteria A (IOP ≤15mmHg), 72% in criteria B (IOP ≤18 mmHg) and 80 % in criteria C (IOP ≤15 mmHg), 12 months after the second surgery. Conclusion: The same-site DS re-operation with subconjunctival and subscleral collagen matrix (Ologen®) and minimal use of mitomycin C is a safe and adequate technique for the reduction of IOP, especially when targeted IOP is not lower than 15mmHg.

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Purpose: To present two different surgical procedures for the treatment of retinal folds after retinal reattachment surgery.Methods: Two different surgical techniques on two cases of retinal folds depending on their presentation time and position on the posterior pole.Results: Case one and two had retinal folds involving macula, both required surgeries, on the first case injection of subretinal fluid (BSS) was used for unfolding, and in the second case, peripheric retinectomy and redetachment of the retina was performed. Visual symptoms resolution and flattening of the retina was achieved in both cases after follow-up period. Conclusion:Surgical treatment of retinal folds involving macula must be addressed promptly to avoid visual impairment, conversely, extrafoveal folds can be appropriately managed with a conservative approach if visual acuity is correct.

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