1,721,108 research outputs found
Surgical management of retinal detachment because of macular hole in highly myopic eyes
No full textPURPOSE: The purpose of this study was to review the current management of macular hole retinal detachment in highly myopic eyes. METHODS: We searched English MEDLINE databases from January 1997 to January 2011 for surgical management of macular hole retinal detachment in highly myopic eyes. The main outcomes reported include retinal reattachment and visual acuity after primary surgery. RESULTS: Surgical procedures including pneumoretinopexy, pars plana vitrectomy with gas or silicone oil tamponade with or without laser therapy around the macular hole, and macular buckling have been the primary treatment choices. New techniques, including internal limiting membrane or epiretinal membrane peeling and heavy silicone oil tamponade, have been introduced over the last decade, and use of optical coherence tomography has allowed evaluation of the postoperative anatomical status of holes undetectable by conventional ophthalmoscope or lens biomicroscope. Poor functional and anatomical outcomes and nonclosure or reopening of a macular hole are still crucial problems, and some patients may require multiple procedures. CONCLUSION: Macular hole retinal detachment in highly myopic eyes is one of the most difficult types of retinal detachment to treat, and its primary treatment choice is still controversial, although the different surgical techniques reported in this review have been demonstrated as good surgical options. Randomized clinical trials are largely lacking. © Lippincott Williams & Wilkins
Transconjunctival sutureless 25-gauge versus 20-gauge standard vitrectomy: Correlation between corneal topography and ultrasound biomicroscopy measurements of sclerotomy sites
No full textPurpose: To determine the correlation between corneal shape changes and ultrasound biomicroscopy (UBM) findings at the sclerotomy sites in conventional 20-gauge (G) pars plana vitrectomy (PPV) and 25-G transconjunctival sutureless vitrectomy (TSV) and to compare the effectiveness of the two surgical methods. Design: Prospective, comparative, observational case series. Methods: Sixty consecutive eyes (60 patients) undergoing primary 3-port PPV. Thirty eyes (30 patients, group 20-G) were treated with 20-G standard PPV and 30 eyes (30 patients, group 25-G) with 25-G TSV. We compared healing of the sclerotomy sites in the two groups. We determined the correlation between corneal shape changes (surgically induced astigmatism) measured by videokeratography and the durations of scleral healing cicatrization by UBM within each group. Results: UBM examination showed that the 20-G sclerotomy sites took about 8 weeks to heal, measured as complete opposition, whereas healing of the 25-G TSV sclerotomy was quite rapid, with complete scleral opposition in about 4 weeks. Corneal topography analysis showed, during the early postoperative period, a surgically induced steepening of the cornea in both groups (20 G, 3.08 ± 0.56 diopters and 25 G, 0.805 ± 0.61 diopters, P < 0.001, Mann-Whitney test), which then decreased gradually, recovering to the preoperative level within two months in group 20 G (P > 0.05) and 1 month in group 25 G (P > 0.05). We found a strong statistical correlation between the mean surgically induced keratometric astigmatism and the mean UBM measures of scleral healing (r = 0.99 for group 20 G and r = 0.97 for group 25 G). Conclusion: After PPV, astigmatic changes are especially significant in the early postoperative period in 20-G group; the 25-G TSV system results in faster reduction of surgically induced keratometric astigmatism because of rapid cicatrization of the sclerotomy sites. © 2009 by Lippincott Williams & Wilkins
Evaluation of homocysteine and its metabolic cofactors in patients with non proliferative and proliferative diabetic retinopathy
No full textCorrelation of optical coherence tomography pattern and visual recovery after vitrectomy with silicone oil for retinal detachment
No full textPURPOSE: To assess prospectively the features of the macular surface in silicone oil-filled eyes after surgery by analyzing whether silicone oil affects optical coherence tomography (OCT) measurements and their reproducibility and whether a statistical correlation exists between postoperative best-corrected visual acuity (BCVA) and foveal thickness measured by OCT. METHODS: Twenty eyes of 20 patients underwent vitrectomy with silicone oil tamponade for retinal detachment. After vitrectomy, complete ophthalmic examination including determination of BCVA and OCT was performed to quantify the visual recovery and the foveal thickness. RESULTS: Ophthalmoscopy revealed that the retina appeared to be reattached in all 20 eyes at 3 months after surgery. BCVA ranged from 0.4 logMAR to 1.7 logMAR, and foveal thickness ranged from 80 μm to 500 μm. Postoperative foveal thickness and BCVA had a strong correlation (r = 0.93; P = 0.003). CONCLUSION: The presence of silicone oil in the vitreous chamber does not change the reproducibility of OCT measurements of foveal thickness (coefficient of reproducibility, 1.48%). This study showed high statistical correlation between BCVA and foveal thickness. Therefore, postoperative BCVA is affected by postoperative foveal thickness, and visual improvement is limited in eyes with increased or decreased foveal thickness. © The Ophthalmic Communications Society, Inc
Manzano e Montejo: due modi di raccontare l’essere cubano (e mestizo)
No full textLa nascita del romanzo a Cuba vede in Manzano uno dei suoi esponenti più caratteristici, sia per la singolarità della sua esistenza –è negro e schiavo- sia per l’eccezionalità dell’esercizio narrativo, che si traduce in modalità di affermazione di un controverso esser(ci) nel mondo. Manzano codifica la propria identità mediante la scrittura, dice l’essere meticcio attestandosi come abitante di un terzo spazio, a cavallo tra la cultura d’origine, aborrita e la cultura d’acquisizione, anelata. Di contro Montejo, tradotto da Barnet, rivendica la propria africanità riconoscendola come ritrovato spazio di affermazione di un’essenza del margine, differenziale spuria contesa ma al contempo respinta dal centro del potere. Le due Autobiografie serviranno come piattaforma per esplorare le differenti modalità di fondazione dell’essere nazionale, tanto più interessanti poiché decentrate e collocate nel territorio dell’Alterità
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