Publications by authors named "Dong Heun Nam"
Purpose: This study aimed to investigate changes in cytokine levels after intravitreal bevacizumab injection in patients with chronic central serous chorioretinopathy (CSC).
Methods: In a prospective interventional trial, 12 eyes from 12 patients with chronic CSC and six eyes from six patients who underwent cataract surgery were included as controls. Patients diagnosed as with CSC received a single intravitreal injection of bevacizumab (1.
Purpose: To evaluate the efficacy of the illuminated chopper-assisted cataract surgery in terms of shortening the surgical time in eyes with miosis after femtosecond laser pretreatment.
Methods: As retrospective study, three hundred thirty-six eyes of 336 consecutive patients who underwent the femtosecond laser and illuminated chopper-assisted cataract surgery were included. Cases with pupil less than 6 mm after femtosecond laser pretreatment were included in the miosis group.
Purpose: To compare patient experiences and cooperation and the clinical outcomes illuminated chopper vs conventional chopper during cataract surgery.
Setting: 4 tertiary institutions in Korea.
Design: Prospective, randomized, paired-eye, controlled pilot study.
Background: To compare the intraoperative challenges, complications, and operation time of illuminated chopper-assisted cataract surgery between cataract surgery only and phacovitrectomy in eyes with diabetic retinopathy.
Methods: One university hospital, retrospective case series. Two hundred ninety-five eyes of 295 consecutive patients with diabetic retinopathy who underwent cataract surgery only or phacovitrectomy were retrospectively reviewed.
Purpose: To introduce a new surgical technique with a beveled vitrectomy probe for the removal of peripheral vitreous cortex remnants (VCR) in primary rhegmatogenous retinal detachment (RRD).
Methods: This study was a retrospective case series. From September 2019 to June 2022, 54 patients with complete or partial posterior vitreous detachment who underwent vitrectomy for primary RRD by a single surgeon were enrolled.
Purpose: The aim of this study was to evaluate the efficacy of the illuminated chopper-assisted cataract surgery in terms of shortening the surgical time and reducing the use of pupil expansion devices in eyes with iris challenges.
Methods: This was a retrospective case series of a university hospital. Four hundred forty-three eyes of 433 consecutive patients who underwent illuminated chopper-assisted cataract surgery were included in this study.
Background: To evaluate the effect of the light intensity of the surgical microscope and illuminated chopper on the anterior chamber temperature.
Study Design: Experimental study.
Methods: A model eye (Kitaro WetLab System; FCI Ophthalmics, Pembroke, MA, USA) was used in this experimental study.
Purpose: To compare image resolution and depth between the microscope versus intracameral illumination images during 3D heads-up cataract surgery.
Methods: We collected 25 consecutive patients who had cataract surgery using the 3D viewing system. Based on bright, contrast, visibility, and color balance, the digital images (RGB color and three monochromes) extracted at the same point of the procedures were compared between the two illuminations.
Purpose: To evaluate light exposure from microscope versus intracameral illuminations to patient's and surgeon's retina during cataract surgery.
Methods: Thirty consecutive patients who had cataract surgery using microscope and intracameral illuminations. At the point of the ocular of an operating microscope, optical illuminance and irradiance from the microscope illumination (60, 40, 20% intensity) and the intracameral illumination (60% intensity) were measured using a light meter and a spectrometer at a pause after lens capsule polishing in cataract surgery.
Purpose: To evaluate intraoperative complications and utilization of adjunctive devices between microscope and intracameral illuminations during cataract surgery in the elderly over 75 years.
Design: A retrospective, consecutive, interventional case series Two hundred eighty-six eyes of 184 patients older than 75 years who underwent cataract surgery using microscope and intracameral illuminations.
Methods: A chart review was performed on an advanced cataract surgery group of 141 consecutive cases in which the intracameral illumination was used and on a standard cataract surgery group of 145 consecutive cases in which the intracameral illumination was not used.
Purpose: To demonstrate the advantages and efficacy of an air-perfused membrane dissection to control intraoperative bleeding in 23-gauge sutureless vitrectomy for proliferative diabetic retinopathy with severe fibrovascular membranes. Meterials and Methods: A prospective, consecutive, interventional case series of 15 eyes that underwent air-perfused diabetic vitrectomy (air vitrectomy group) for removal of the membranes was compared with a retrospective, membrane-matched case series of 10 eyes that underwent conventional diabetic vitrectomy (conventional vitrectomy group). The main outcome measures were real vitrectomy time, intraoperative and postoperative complications, and anatomic and functional successes at the final examination.
View Article and Find Full Text PDFPurpose: To evaluate macular photostress and visual experience between coaxial microscope illumination versus oblique intracameral illumination during cataract surgery.
Setting: Gachon University Gil Hospital, Incheon, South Korea.
Design: Prospective case series.
Rationale: Glaucoma drainage implant surgery is a treatment option for the management of neovascular glaucoma. However, tube obstruction by blood clot after Ahmed glaucoma valve (AGV) implantation is an unpredictable clinically challenging situation.
Patient Concerns-diagnoses-interventions: We report 4 cases using intracameral air injection for the prevention of the tube obstruction of AGV by blood clot.
Changes in aqueous concentrations of various cytokines after intravitreal bevacizumab and subtenon triamcinolone injection for diabetic macular edema.
Graefes Arch Clin Exp Ophthalmol
January 2018
Purpose: The purpose of this study was to compare the changes in the aqueous cytokine levels after intravitreal bevacizumab with those after combined intravitreal bevacizumab and subtenon triamcinolone injection in diabetic macular edema (DME).
Methods: This study examined 24 eyes of 23 patients with DME. Each patient with DME received randomly either an intravitreal injection of bevacizumab (IVBe) or IVBe with a subtenon triamcinolone injection (IVBe + STTA).
Aim: To evaluate the axial length (AXL) in unilateral idiopathic central serous chorioretinopathy (CSC).
Methods: This retrospective case-control study was comprised of a consecutive case series of 35 patients with acute unilateral idiopathic CSC, and age- and sex-matched 50 control eyes. AXL of both eyes of unilateral CSC patients and the control eyes were investigated.
Purpose: To evaluate the efficacy and outcomes of intracameral illuminator-assisted nucleofractis technique in cataract surgery.
Methods: Since June 2012, this novel technique has been performed in all cataract cases by one surgeon (approximately 300 cases of various densities). Trenching continues until the posterior plate white reflex between an endonucleus and an epinucleus is identified (enhanced depth trench).
Purpose: To report the intraoperative optical coherence tomography findings in idiopathic epiretinal membrane (ERM) with connecting strands and to describe the postoperative outcomes.
Methods: A retrospective, case series study within a prospective observational intraoperative optical coherence tomography imaging study was performed. Epiretinal membranes with connecting strands were characterized on preoperative spectral domain optical coherence tomography images and assessed against corresponding intraoperative (after internal limiting membrane [ILM] peeling) and postoperative spectral domain optical coherence tomography images.
Aim: To assess the outcomes of combined 23-gauge sutureless vitrectomy and clear corneal phacoemulsification with intraocular lens implantation for rhegmatogenous retinal detachment (RRD) repair.
Methods: This was a retrospective, consecutive, non-comparative, interventional case series of 30 eyes of 30 patients who underwent combined sutureless vitrectomy and clear corneal cataract surgery for the repair of RRD. The principal outcome measures were primary anatomical success rate, reasons for redetachment, final visual acuity, and surgical complications.
Purpose. To compare the changes in corneal endothelial cells after pars plana Ahmed glaucoma valve (AGV) implantation with those after the anterior chamber AGV implantation for refractory glaucoma. Methods.
View Article and Find Full Text PDFBackground And Objective: The authors propose a novel trimanual vitreous surgery using assistant-adjusted endoillumination during 23-gauge sutureless vitrectomy for severe diabetic tractional retinal detachment (TRD) under noncontact wide-angle viewing system.
Materials And Methods: The trimanual sutureless vitrectomy under a wide-angle viewing system consisted of (1) a fourth-port microcannula in the inferior 6-o'clock position; (2) dynamic and specular illumination by an assistant-controlled light probe inserted through the fourth port; and (3) membrane dissection and bleeding control using two intraocular instruments.
Results: Six eyes of four patients who underwent trimanual diabetic vitrectomy were evaluated.
Aims: To compare the corneal refractive changes induced after 3.0 mm temporal and nasal corneal incisions in bilateral cataract surgery.
Materials And Methods: This prospective study comprised a consecutive case series of 60 eyes from 30 patients with bilateral phacoemulsification that were implanted with a 6.