Morio Okada

Kurashiki Central Hospital, Kurasiki, Okayama, Japan

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Publications (7)28.42 Total impact

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    ABSTRACT: To detect the prognostic factors associated with initial reattachment after primary pars plana vitrectomy (PPV) with gas tamponade for retinal detachment attributable to macular hole (MHRD). Retrospective, multicenter, interventional case series. This study included 49 eyes of 48 patients with MHRD in high myopia (axial length more than 28.0 mm). All eyes underwent PPV with gas tamponade. We retrospectively reviewed the medical records and performed univariate analysis to detect the presence of any difference between eyes with a successful initial reattachment and those that failed. We performed multivariate logistic regression analysis to assess the influence of each preoperative factor on initial success. Success rate of initial reattachment was 69%. Postoperative best-corrected visual acuity (BCVA) of 34 eyes with initial success was significantly better than those of 15 eyes with initial failure (P < .05); preoperative BCVA was not significantly different (P = .43). The axial length of eyes with initial success (29.26 +/- 0.94 mm) was shorter than that of eyes with initial failure (30.04 +/- 1.49 mm) with borderline significance (P = .049). There were no significant differences noted for other factors such as use of ILM peeling (P = .43) or type of tamponade gas (P = .99). Multiple logistic regression analysis using preoperative factors indicated that only axial length was significantly associated with initial success (odds ratio, 0.49; 95% confidence interval, 0.26 to 0.93; P < .05). Initial reattachment is important for visual prognosis, and axial length is a prognostic factor for initial reattachment after PPV with gas tamponade for MHRD in high myopia.
    American Journal of Ophthalmology 06/2008; 146(2):198-204. DOI:10.1016/j.ajo.2008.04.022 · 4.02 Impact Factor
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    ABSTRACT: Eyes with scleral rupture after blunt trauma are often complicated by proliferative vitreoretinopathy. A 56-year-old man sustained blunt trauma to his left eye. Visual acuity was light perception. The fundus was obscured by hyphema. Computed tomography imaging and the presence of extensive subconjunctival hemorrhage suggested scleral rupture. Prompt primary surgery to repair a 25-mm scleral rupture was performed under general anesthesia. No retinal detachment developed. Two years postoperatively, visual acuity increased to 12/20. This case shows that retinal detachment and proliferative vitreoretinopathy may not complicate extensive scleral ruptures under certain circumstances.
    Ophthalmic Surgery Lasers and Imaging 05/2008; 39(3):242-5. DOI:10.3928/15428877-20080501-20 · 1.32 Impact Factor
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    ABSTRACT: The objective is to report a rare case of asymptomatic penetrating injury with a copper foreign body found during an examination for cataract surgery. A case report. A 73-year-old woman had vision loss. Examination by pupil dilation disclosed a dark-brown metallic mass located under the anterior capsule of the lens, as well as nuclear sclerosis of the lens. Although no history of traumatic injury was reported by the patient, careful examination revealed a dot corneal opacity. This finding, and the past history of the patient that she had worked in the fabrication of copper wire, suggested previous penetrating injury. The iris had no scar. No inflammatory reaction was observed in the posterior segment of the eye. Phacoemulsification and implantation of an intraocular lens were performed. After continuous curvilinear capsulorrhexis (CCC), the foreign body was extracted with a microforceps. The anterior capsule overlying the foreign body was intact, with normal light reflex. Qualitative analysis showed that the foreign body extracted contained pure copper at the center. Nevertheless, visual acuity of the right eye improved from 20/50 to 20/20 without any copper-related retinal damage. In this case, copper localized under the anterior capsule of the lens had been able to stay in the eye without causing severe inflammatory reaction.
    International Ophthalmology 11/2007; 27(5):329-31. DOI:10.1007/s10792-007-9074-5 · 0.55 Impact Factor
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    ABSTRACT: To report a case of cancer-associated retinopathy associated with invasive thymoma. Interventional case report. A 41-year-old Japanese woman was observed between February 1998 and May 2001. Ophthalmologic examinations and systemic examinations were performed. The patient received treatment including corticosteroid pulse therapy, plasmapheresis, and thymectomy. The patient developed progressive visual dysfunction including bilateral visual acuity loss, concentric contraction of visual fields, and color vision loss. In both eyes, retinal vessel attenuation and retinal pigment epithelium degeneration were observed with fundus ophthalmoscopy and fluorescein angiography. Response in electroretinogram was reduced, suggesting both rod and cone dysfunction. Autoantibody against 23-kD cancer-associated retinopathy (CAR) antigen (antirecoverin antibody) was detected in the patient's serum. A mediastinal tumor that was histopathologically diagnosed as invasive thymoma was detected and was surgically resected. During more than 3 years of follow-up, no other malignancy was detected despite extensive systemic evaluation. The patient also suffered from subclinical myasthenia gravis. Although temporary improvement of visual function was observed after treatment with steroid pulse therapy and plasmapheresis' light perception of each eye was lost in the end. The patient was diagnosed as having CAR. Invasive thymoma was considered to be the causative tumor because there had been no evidence that suggested other systemic malignancy during more than 3 years of follow-up.
    American Journal of Ophthalmology 10/2002; 134(3):383-9. DOI:10.1016/S0002-9394(02)01598-2 · 4.02 Impact Factor
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    ABSTRACT: To investigate whether a solution of oxybuprocaine hydrochloride, 0.4%, results in a false-positive response in an immunochromatographic SAS Adeno Test. Experimental study. Physiologic saline and 2% lidocaine. Each chemical (100 microl) was diluted in a transport medium. Five drops (200 microl) of the resultant solution were dispensed into the round sample well of a test device. Fifteen samples were tested in each group. Ten minutes after the start of the test, a colored line in the "specimen" portion of the test membrane was visually read as positive or negative by a masked technician. No positive reaction was observed in the control groups (physiologic saline and lidocaine). A false-positive reaction was observed in six samples (33.3%) in the oxybuprocaine group. The positive rate was significantly higher in the oxybuprocaine group compared with those in control groups (P = 0.0062, Fisher's extract probability test). Oxybuprocaine may induce a false-positive reaction in an immunochromatographic SAS Adeno Test. We recommend the use of lidocaine, instead of oxybuprocaine, for local anesthesia in taking eye swabs from patients with suspected adenovirus infection.
    Ophthalmology 05/2002; 109(4):808-9. · 6.17 Impact Factor
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    ABSTRACT: Objective To investigate whether a solution of oxybuprocaine hydrochloride, 0.4%, results in a false-positive response in an immunochromatographic SAS Adeno Test.
    Ophthalmology 04/2002; 109(4):808-809. DOI:10.1016/S0161-6420(01)01028-4 · 6.17 Impact Factor
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    ABSTRACT: To clarify the characteristics of ocular manifestations in Churg-Strauss syndrome (allergic granulomatosis and angiitis). Two interventional case reports and literature review. Two patients with Churg-Strauss syndrome with ocular manifestations are described; 15 previously reported cases and the present 2 cases of Churg-Strauss syndrome with ocular manifestations are reviewed. Ocular manifestations were divided into two groups: orbital inflammatory pseudotumor and ischemic vasculitis. The onset, conjunctival involvement, orbital imaging, antineutrophil cytoplasmic antibodies (ANCA), and visual prognosis were evaluated. The characteristics of the orbital inflammatory pseudotumor type (eight cases) are chronic onset, positive conjunctival involvement, abnormalities in orbital imaging studies, negative ANCA, and good visual prognosis. The ischemic type (nine cases) is characterized by sudden onset, no conjunctival involvement or abnormalities in imaging studies, positive ANCA, and occasional poor visual prognosis. Orbital inflammatory pseudotumor and ischemic vasculitis may represent two essential characteristics of Churg-Strauss syndrome, granulomatosis and angiitis, respectively. The clinical features of the two types are so distinct that differentiation may be meaningful for diagnosis and treatment of Churg-Strauss syndrome with ocular manifestations.
    Ophthalmology 07/2001; 108(6):1129-33. DOI:10.1016/S0161-6420(01)00557-7 · 6.17 Impact Factor