Yumi Hasegawa

Learn More
PURPOSE To investigate the time course of changes in aqueous flare intensity after vitrectomy for rhegmatogenous retinal detachment (RD) and to determine the clinical factors related to an increase in aqueous flare. METHODS The present study included 22 unilateral patients with RD undergoing primary 20-gauge vitrectomy. Aqueous flare intensity was(More)
PURPOSE To determine the incidence of and risk factors for intraocular pressure (IOP) elevation in the immediate postoperative period after vitrectomy for various vitreoretinal disorders. METHODS A prospective study was performed in 228 consecutive patients with various vitreoretinal disorders. The IOP was measured before surgery, at the end of surgery,(More)
PURPOSE To compare the Acrysof IQ toric intraocular lens (IOL) and the Acrysof IQ aspheric nontoric IOL and evaluate the effect of preoperative corneal astigmatism orientation on results. SETTING Department of Ophthalmology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan. DESIGN Comparative case series. METHODS This retrospective chart(More)
The purpose of this study was to determine the incidence of and risk factors for intraocular pressure (IOP) elevation within 24 h following vitrectomy for rhegmatogenous retinal detachment (RD). We assessed 34 eyes of 34 consecutive patients with RD undergoing vitrectomy and 12 eyes of 12 patients with macular hole as controls. IOP was measured using(More)
PURPOSE To measure ophthalmodynamometric pressure (ODP) during vitrectomy in patients with proliferative diabetic retinopathy (PDR). DESIGN Prospective, interventional, consecutive case series. METHODS This study included 75 eyes of 75 patients undergoing vitrectomy for PDR. After core vitrectomy, the intraocular pressure was gradually raised using a(More)
In hard disk drives, it is important to increase the control bandwidth in order to shorten the track pitch for larger data capacity. However, it is difficult for H<sub>&#x0221E;</sub> control theory to increase the control bandwidth if the mechanical resonance modes have uncertainty. This is because that the robustness of the H<sub>&#x0221E;</sub> control(More)
OBJECTIVE To assess the effect of pterygium size on time-course change of corneal topography after excision surgery of primary pterygium. METHODS Retrospective case series included eyes that underwent excisions of primary pterygium. Pterygium size was graded according to the advancing edge position: less than one third of corneal diameter (grade 1),(More)
PURPOSE To measure ophthalmodynamometric pressure (ODP) with the vented-gas forced-infusion (VGFI) system during vitrectomy in patients with various vitreoretinal disorders and to investigate factors related to ODP. METHODS This study included 169 eyes of 169 patients undergoing pars plana vitrectomy. After core vitrectomy, the intraocular pressure was(More)
The level of endothelin (ET)-1, a uterotonin, increases in amniotic fluid during labor. The known metallopeptidases include ET-converting enzyme (ECE), which converts inactive precursor to potent ET-1, and neutral endopeptidase (NEP), which inactivates ET-1. These enzymes are present in fetal membranes, and the aims of this study were to establish the(More)
BACKGROUND Choroidal osteoma is a rare intraocular tumor, composed of mature bone tissue. We performed high-penetration optical coherence tomography (HP-OCT) on a patient with choroidal osteoma with serous retinal detachment(SRD). CASE A 49-year-old woman complained of visual loss OD. Best corrected visual acuity OD was 0.4. The right eye showed a(More)