Search

Shumpei Obata, Yusuke Ichiyama, Masashi Kakinoki, Osamu Sawada, Yoshitsugu Saishin, Masahito Ohji Department of Ophthalmology, Shiga University of Medical Science, Shiga, JapanCorrespondence: Shumpei ObataShiga University of Medical Science, 520 – 2192, Seta Tsukinowacho, Otsu City, Shiga, JapanTel +81-77-548-2276Fax +81-77-548-2279Email obata326@belle.shiga-med.ac.jpPurpose: The classification of lamellar macular holes (LMHs) into two subtypes has recently been proposed. However, the effectiveness of vitrectomy for treatment of each type of LMH is not well established. The goal of this study was to compare functional and anatomic changes after vitrectomy between eyes with degenerative LMH and those with tractional LMH.Patients and methods: This was a retrospective analysis of the medical records of patients with LMH who underwent vitrectomy. Best-corrected visual acuity (BCVA) and central macular thickness (CMT) were measured preoperatively (baseline), as well as at 1, 3 and 12 months postoperatively. BCVA and CMT were compared between eyes with degenerative LMH and those with tractional LMH.Results: Thirty-two eyes met the inclusion criteria. Thirteen eyes were diagnosed with degenerative LMH and 19 eyes were diagnosed with tractional LMH. Compared with baseline BCVA, postoperative BCVA improved significantly at 12 months postoperatively: from 0.33 to 0.12 logarithm of the minimum angle of resolution (logMAR) in eyes with degenerative LMH and from 0.30 to 0.12 logMAR in eyes with tractional LMH (p < 0.05 for both comparisons). BCVA at 12 months postoperatively did not significantly differ between the two groups. CMT decreased significantly from 419.4 μm at baseline to 364.2 μm at 12 months postoperatively in eyes with tractional LMH (p < 0.05); conversely, there was no significant difference in eyes with degenerative LMH (315.5 μm baseline to 314.9 μm at 12 months postoperatively; p > 0.05).Conclusion: Vitrectomy improved BCVA in eyes with degenerative LMH as well as in eyes with tractional LMH. BCVA at 12 months postoperatively did not differ between the two groups.Keywords: lamellar macular hole, surgery, visual acuity, ellipsoid zone

Shumpei Obata,1 Tomoaki Higashiyama,1 Taku Imamura,1 Masashi Kakinoki,1 Takahide Yanagi,2 Yoshihiro Maruo,2 Masahito Ohji1 1Department of Ophthalmology, Shiga University of Medical Science, Otsu, Japan; 2Department of Pediatrics, Shiga University of Medical Science, Otsu, JapanCorrespondence: Shumpei ObataDepartment of Ophthalmology, Shiga University of Medical Science, Seta Tsukinowacho, Otsu, Shiga 520-2192, JapanTel +81-77-548-2276Fax +81-77-548-2279Email obata326@belle.shiga-med.ac.jpPurpose: To evaluate short-term changes in intraocular pressure after intravitreal injection of bevacizumab for retinopathy of prematurity.Patients and methods: This study was a prospective case-series. Consecutive infants underwent intravitreal injection with bevacizumab for type 1 retinopathy of prematurity at a university hospital. Intraocular pressure was measured with tonometer at baseline, at 1 min, and at 3, 10, 30 and 60 mins after injection.Results: Five patients (four boys) were enrolled in this study. Mean (± standard deviation) intraocular pressure was 8.0 ± 2.4 mmHg (range: 6–11.5 mmHg) just before the intravitreal injection, and the pressures were 19.8 ± 2.8 mmHg (16.4–23.9 mmHg), 14.6 ± 4.4 mmHg (7.6–18.4 mmHg), 11.2 ± 4.2 mmHg (6.4–16.5 mmHg), 9.3 ± 3.5 mmHg (5.8–13.2 mmHg), and 8.2 ± 1.4 mmHg (6.9–10.0 mmHg) at 1 min, 3, 10, 30 and 60 mins after the injection, respectively. Mean intraocular pressure after 1 min was significantly higher than intraocular pressure before injection (p = 0.02). Pressures decreased between 1 min and 3 mins after intravitreal injection, although there was no statistically significant difference between the pressures at those time-points. Intraocular pressures after 3, 10, 30 and 60 mins were not significantly different from the pressure before injection.Conclusion: Intraocular pressure elevation after intravitreal injection of bevacizumab for neonatal infants may be mild, so there may be a limited risk due to intraocular pressure after intraocular injection of bevacizumab for retinopathy of prematurity.Keywords: retinopathy of prematurity, intraocular pressure, bevacizumab

Adult visual cortex undergoes substantial functional change as a result of alterations in visual experience. Binocular retinal lesions lead to a reorganization of the visuotopic map in primary visual cortex. Associated with this change is a strengthening of an existing plexus of long-range horizontal connections by sprouting of axon collaterals and synaptogenesis. To explore the molecular substrate of this change, we studied the expression of potential factors involved in neural plasticity in the area of reorganization. We found elevation in a number of factors as early as 3 days following the lesion, including neurotrophins BDNF, NT3, NGF and the insulin-like growth factor IGF-1. Associated with the changes in neurotrophin levels was an elevation in their receptors. We also measured elevation of transcription factors, CaMKII, MAP2 and synapsins. These experiments provide evidence for a signal transduction cascade associated with cortical reorganization. [ABSTRACT FROM AUTHOR]

Copyright of Medical & Biological Engineering & Computing is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of BioControl is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)