Publications by authors named "Kazunari Hirota"
Objectives: To investigate the relationship between the shape of the optic nerve head (ONH) margin detected by optical coherence tomography (OCT) and the clinical characteristics of glaucomatous eyes with papillomacular retinoschisis (PMRS).
Methods: The medical record of patients with a PMRS in a glaucomatous eye were reviewed. The eyes were placed into two groups determined by the shape of the ONH margin in the OCT images; eyes with an externally oblique ONH margin (Group 1) and eyes with an internally oblique ONH margin (Group 2).
We reviewed the medical records of 438 eyes in 431 patients who had undergone surgeries for rhegmatogenous retinal detachments (RRD) or proliferative vitreoretinopathy (PVR ≥ Grade C) to determine whether the COVID-19 pandemic had affected outcomes. The patients were divided into 203 eyes in Group A that had undergone surgery from April to September 2020, during the pandemic, and 235 eyes in Group B that had undergone surgery from April to September 2019, before the pandemic. The pre- and postoperative visual acuity, macular detachment, type of retinal breaks, size of the RRD, and surgical outcomes were compared.
View Article and Find Full Text PDFHigh myopia is a major cause of irreversible visual impairment globally. In the present study, we investigated the microRNA (miRNA) profile in the vitreous of macular hole (MH) and high myopic MH. We performed miRNA analysis using TaqMan® Low Density Arrays (Thermo Fisher Scientific, Waltham, MA, USA) to investigate the circulating vitreous miRNA profile from patients with MH (axial length < 26.
View Article and Find Full Text PDFPurpose: To determine the characteristics of the macular dehiscence-associated epiretinal proliferations (EPs) in eyes with full-thickness macular holes (MHs).
Methods: The presence of EPs and the integrity of the retinal microstructures in eyes with MHs were determined by spectral domain optical coherence tomography in 390 eyes of 379 patients (29-89 years). The clinical findings, closure of the MH, the preoperative and postoperative best-corrected visual acuity, and the microstructural changes were compared between eyes with and without EPs.
Purpose: To evaluate the ultrastructure of the internal limiting membranes (ILMs) excised during vitrectomy from highly myopic eyes with myopic traction maculopathy (MTM). The clinical findings before and after the vitrectomy were compared.
Methods: Seven eyes of 7 patients with macular retinoschisis were studied.
Purpose: To compare the efficacy of vitrectomy with inverted internal limiting membrane (ILM) flap to complete removal of the ILM for the treatment of macular hole (MH) retinal detachment in highly myopic eyes.
Methods: Pars plana vitrectomy with inverted ILM flap technique (16 eyes; inverted group) or with the complete removal of the ILM (16 eyes; removed group) was performed in patients with high myopia with MH retinal detachment. The rate of retinal reattachment and MH closure, the best-corrected visual acuities, and the integrity of the foveal microstructures in the optical coherence tomographic images were compared.
Purpose: To determine the size of the foveal avascular zone (FAZ) before and after vitrectomy for a macular hole (MH).
Study Design: Retrospective case series study.
Methods: Twenty-five eyes of 25 patients with a unilateral MH that had undergone vitrectomy with internal limiting membrane peeling were studied.
Background: To evaluate the quality of the images obtained by an ultra-widefield device in gas-filled eyes after vitrectomy for a retinal detachment.
Methods: Retrospective case series. The ultra-widefield scanning laser ophthalmoscopic images (Optos 200Tx imaging system) of 40 eyes that were gas-filled with 40 to 90% of the vitreous cavity after vitrectomy for a rhegmatogenous retinal detachment were studied.
Purpose: To compare the closure rate of macular hole closure and duration of the prone positioning after macular hole (MH) surgery with two protocols for halting the prone positioning.
Methods: The authors studied 129 eyes of 125 consecutive patients with MH who had undergone vitrectomy. In 60 eyes of 59 patients, the prone positioning was halted after detecting an MH closure in the swept-source optical coherence tomographic images (SS group).
Purpose: To determine the outcomes of vitrectomy with scleral imbrication in highly myopic eyes with either myopic traction maculopathy (MTM) or macular hole retinal detachment (MHRD).
Methods: The medical records of 17 patients who had undergone vitrectomy with internal limiting membrane (ILM) peeling and scleral imbrication for MTM or MHRD were reviewed. The best-corrected visual acuities (BCVAs), the axial length, the macular hole (MH) closure rate, and the shape of the posterior segment determined by optical coherence tomography were evaluated.
Purpose: To evaluate clinical characteristics of rhegmatogenous retinal detachment in high myopic and phakic eyes.
Subjects And Method: The subjects were 1174 eyes of phakic rhegmatogenous retinal detachment detected in 1199 eyes that underwent initial vitreoretinal surgery between April 2006 and March 2011. Eyes with macular hole retinal detachment or secondary retinal detachment were excluded.
Purpose: To compare the outcomes of 25-G vitrectomy using a vitreous cutter with a higher cutting rate to that of conventional 25-G vitrectomy with a lower cutting rate on eyes with severe proliferative diabetic retinopathy (PDR).
Methods: The medical records of 393 eyes of 326 patients with severe PDR were reviewed. A higher cutting rate dual-pneumatic 25-G vitrectomy probe (5,000 cuts/min, Constellation) was used on 219 eyes (group C) and a conventional 25-G pneumatic vitrectomy probe with lower cutting rate was used on 174 eyes (2,500 or 1,500 cuts/min, Acurrus) (group A).
[Comparison of Retinal Detachment Associated with Atopic Dermatitis with that of a Blunt Trauma].
Nippon Ganka Gakkai Zasshi
July 2015
Purpose: Retinal detachment associated with atopic dermatitis has been reported to have several similarities to retinal detachment with blunt trauma both in location and types of retinal breaks. To clarify the difference between these two types of retinal detachment, the clinical features of retinal detachment associated with atopic dermatitis to those with blunt trauma were compared.
Method: Among phakic eyes of rhegmatogenous retinal detachment which underwent surgery in our clinic between 2006 and 2011, 51 eyes of 41 cases of retinal detachment associated with atopic dermatitis (Atopy group) and 53 eyes of 51 cases of retinal detachment with blunt trauma (Trauma group) were compared.
Purpose: To compare the outcomes of 23-gauge (G) and 25G vitrectomy to 20G vitrectomy on eyes with severe proliferative diabetic retinopathy (PDR).
Methods: The medical records of 424 eyes of 347 patients with severe PDR were reviewed. There were 80 eyes that had 23G, 174 eyes that had 25G, and 170 eyes that had 20G vitrectomy.
Purpose: To determine the correlation between the integrity of the foveal microstructures and the best-corrected visual acuity (BCVA) after pars plana vitrectomy for a macular pseudohole.
Methods: Thirty-one eyes of 31 patients with a macular pseudohole underwent vitrectomy with internal limiting membrane removal. The foveal area was examined by spectral domain optical coherence tomography preoperatively and postoperatively.
Purpose: Takayasu arteritis is caused by an autoimmune process that results in chronic granulomatous inflammation. We describe the optical coherence tomographic findings in a case of Stage 4 Takayasu retinopathy.
Methods: Case report and evaluation by optical coherence tomography.
Macular retinoschisis associated with glaucomatous optic neuropathy in eyes with normal intraocular pressure.
Graefes Arch Clin Exp Ophthalmol
September 2015
Purpose: The purpose of this study was to evaluate the clinical features, optical coherence tomography (OCT) findings, and surgical outcomes of eyes with macular retinoschisis associated with glaucomatous optic neuropathy and normal intraocular pressure (IOP).
Methods: In this retrospective interventional observational study, 11 eyes of 11 patients who underwent pars plana vitrectomy for macular retinoschisis and glaucomatous optic neuropathy were studied. All eyes had a vertical cup-to-disc ratio of ≥ 0.
Objective: To determine the relation between the recovery of the cone outer segment tips (COST) line and the best-corrected visual acuity (BCVA) after epiretinal membrane (ERM) surgery.
Design: Retrospective, consecutive, interventional case series.
Participants: Sixty-one eyes of 56 patients with an idiopathic ERM were studied.
Purpose: MicroRNAs (miRNAs) are small noncoding RNAs which regulate the activities of target mRNAs. We compared the expression profiles of the miRNAs in the vitreous of eyes with macular hole (MH) to that in eyes with proliferative diabetic retinopathy (PDR).
Methods: Vitreous and whole blood samples were collected from four patients with MH and from four patients with PDR.
Background: To report the optical coherence tomographic (OCT) findings in 4 eyes before and after a spontaneous resolution of a myopic traction maculopathy (MTM).
Method: Retrospective review of medical records including history, examination findings, fundus details, and finding of spectral-domain OCT (Cirrus HD-OCT, Carl Zeiss Meditec, Spectralis, Heidelberg Engineering, Heidelberg) findings in 4 eyes with a spontaneous resolution of MTM.
Results: A release of the vitreofoveal traction was detected by OCT in 3 eyes before the resolution of the MTM.
[Two cases of treatment for juxtapapillary hemangioma associated with von Hippel-Lindau disease].
Nippon Ganka Gakkai Zasshi
January 2014
Background: We compared therapeutic outcomes in two cases of juxtapapillary capillary hemangiomas associated with von Hippel-Lindau disease.
Cases: Case 1 was a 47-year-old man whose left eye was blind due to proliferative vitreoretinopathy. Visual acuity of the right eye was 1.
Correlation between foveal cone outer segment tips line and visual recovery after epiretinal membrane surgery.
Invest Ophthalmol Vis Sci
November 2013
Purpose: To determine whether there is a significant correlation between the integrity of the foveal microstructures and the best-corrected visual acuity (BCVA) after pars plana vitrectomy for epiretinal membrane (ERM) removal.
Methods: This was a retrospective, interventional case series. Forty-six eyes of 45 patients with an ERM underwent vitrectomy.