Publications by authors named "Kwangsic Joo"

Purpose: To evaluate real-world functional and anatomical outcomes, treatment patterns, and ocular examination trends in diabetic macular edema (DME) in Korea.

Methods: A prospective, multicenter, observational study was conducted at 17 hospitals (2017-2022) involving adults with DME. Patients were categorized into center-involving (CI DME) and non-center-involving (non-CI DME) groups based on optical coherence tomography findings.

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: Senior-Loken syndrome (SLS) is a rare autosomal recessive renal-retinal disease caused by mutations in 10 genes. This study aimed to review the ophthalmic findings, renal function, and genotypes of Korean SLS cases. : We retrospectively reviewed 17 genetically confirmed SLS patients in Korea, including 9 newly identified cases and 8 previously reported.

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Purpose: To investigate and compare the clinical characteristics of patients with unilateral high myopia (UHM) and bilateral high myopia (BHM) based on axial length (AL).

Design: A retrospective cohort study.

Participants: Adult patients diagnosed with UHM or BHM between March 2011 and August 2021.

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Purpose: To investigate the morphological characteristics of dome-shaped macula (DSM) and inferior staphyloma complicated by serous retinal detachment (SRD).

Methods: Electronic medical records and multimodal images of patients diagnosed with DSM and inferior staphyloma were retrospectively reviewed. Morphological features, including axial length, curvature height, orientation of the dome, presence of retinal pigment epithelial detachment, choroidal vascular features such as subfoveal choroidal thickness, variations in choroidal thickness, presence of abrupt changes in choroidal thickness and presence of large choroidal vessels were analyzed.

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Central serous chorioretinopathy (CSC) is a major cause of vision loss, especially in middle-aged men, and its chronic subtype can lead to legal blindness. Despite its clinical importance, the underlying mechanisms of CSC need further clarification. In this study, we conducted a meta-analysis of three genome-wide association studies (GWASs) for CSC consisting of 8811 Asians and Caucasians, followed by replication in an additional 4338 Asians.

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Purpose: To evaluate the incidence and risk factors of late-onset intraocular pressure (IOP) elevation in patients who underwent pars plana vitrectomy with silicone oil (SO) injection for the management of various vitreoretinal pathologies.

Study Design: A retrospective observational study.

Methods: A single-center study involving 135 eyes of 129 patients who underwent vitrectomy with SO injections between January 2018 and May 2023 and maintained SO tamponade for ≥1 month.

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Purpose: To describe in detail the genetic profile, clinical features, and genotype-phenotype correlation of retinitis pigmentosa GTPase regulator (RPGR)-associated X-linked retinitis pigmentosa (RP) in Koreans.

Design: A retrospective multicenter case series.

Methods: This study recruited genetically confirmed RPGR-associated X-linked RP patients from nine tertiary hospitals and clinics across Korea.

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Purpose: To compare the image quality and safety of ultra-widefield fluorescein angiography using 3 mL (300 mg) versus 1 mL (100 mg) of 10% fluorescein.

Methods: In this prospective, randomized clinical trial, a total of 144 patients who required ultra-widefield fluorescein angiography examination for various retinal diseases were randomized 1:1 to 300 mg or 100 mg of fluorescein. Images were qualitatively graded by three retinal specialists and quantitatively analyzed.

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Article Synopsis
  • - This study examines the link between Moyamoya disease (MMD) and open-angle glaucoma (OAG) using data from 36,432 MMD patients and 346,769 matched controls in South Korea from 2002 to 2022.
  • - Researchers used statistical models to find that patients with MMD had a significantly higher risk of developing OAG compared to those without MMD, with a hazard ratio of 1.26.
  • - The cumulative incidence of OAG was 3.7% in the MMD group versus 2.9% in the control group, indicating that MMD patients consistently faced a greater risk of developing OAG throughout the study.
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  • - The study aimed to explore the risk of retinal vascular occlusion in patients with Moyamoya disease (MMD) using data from a large national health insurance database in Korea.
  • - Researchers analyzed over 34,000 newly diagnosed MMD patients and matched them with control subjects to investigate the occurrence of retinal vascular occlusion events through specific diagnostic codes.
  • - Results indicated that MMD patients had a significantly higher risk of developing retinal vascular occlusion, with particular concern for central retinal artery occlusion, highlighting MMD as a notable risk factor for this condition.
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Purpose: To describe the clinical and genetic features of Korean patients with peripheral retinal flecks unrelated to aging.

Methods: A retrospective analysis was conducted on the clinical characteristics of patients with symmetric peripheral retinal flecks. Age-related deposits such as reticular pseudodrusen were excluded, as well as secondary deposits related to intraocular inflammation, tumor, and drug toxicity.

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Article Synopsis
  • * Significant associations were found with three specific single nucleotide polymorphisms (SNPs), with two SNPs (rs1916762 and rs7587019) confirmed to affect choroidal thickness, while one (rs13320098) did not show consistent results.
  • * The gene FAM124B, located near the identified SNPs, was found to be crucial as its expression in endothelial cells correlated with changes in vascular health, suggesting it plays a role in subfoveal choroidal thickness in aging
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Purpose: To investigate the significance of intravitreal anti-vascular endothelial growth factor treatment in patients with neovascular age-related macular degeneration and poor visual acuity.

Methods: Retrospective study of patients with neovascular age-related macular degeneration with baseline best-corrected visual acuity of ≤20/200. Patients were divided into regular treatment and scarce treatment groups according to whether they underwent consecutive intravitreal anti-vascular endothelial growth factor treatments at intervals of ≤4 months or not.

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Purpose: To determine the association between pentosan polysulfate (PPS) use and the subsequent development of maculopathy in an Asian population.

Design: A nationwide, population-based retrospective cohort study using the Health Insurance Review and Assessment Service database.

Participants: A total of 103 553 individuals in the PPS user group and 205 792 individuals in the PPS nonuser group, all newly diagnosed with cystitis between 2009 and 2020.

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Purpose: Homozygous hypomorphic variants of the RP1 gene, including c.5797C>T, p.Arg1933Ter, have traditionally been considered non-pathogenic.

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Article Synopsis
  • - The study examines the rates of screening for diabetic retinopathy (DR) in Korea, finding that only 29.5% of participants aged 40 and above with diabetes were screened in the past year, with no significant change over time from 2016 to 2021.
  • - Risk factors for not getting screened include living in rural areas, being older (≥80 years), having a lower education level, self-reporting good health, not having eye diseases, smoking, lack of exercise, not following dietary diabetes treatments, and having no activity limitations.
  • - The overall low screening rates indicate a need for educational interventions to improve awareness and increase annual screenings among diabetic patients in Korea.
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Article Synopsis
  • The study aimed to evaluate the long-term effectiveness and safety of brolucizumab (BRZ) injections in patients with typical neovascular age-related macular degeneration (nAMD) and polypoidal choroidal vasculopathy (PCV).
  • It included 401 patients over a follow-up period of at least 12 months, assessing visual acuity, retinal fluid, and central subfield thickness (CST), with positive results noted across both patient groups.
  • Brolucizumab maintained visual acuity and significantly improved retinal fluid management; however, there were instances of intraocular inflammation, with some cases leading to severe complications after treatment.
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Purpose: Pathogenic variants in North Carolina macular dystrophy (NCMD) have rarely been reported in the East Asian population. Herein, we reported novel variants of NCMD in 2 Korean families.

Methods: The regions associated with NCMD were analyzed with genome sequencing, and variants were filtered based on the minor allele frequency (0.

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To compare the efficacy of scleral buckling with adjuvant pneumatic retinopexy (SB with PR) and scleral buckling (SB) alone for primary rhegmatogenous retinal detachment (RRD). This retrospective and comparative study included patients who underwent SB with PR (n = 88) or SB alone (n = 161) for primary RRD. The primary anatomical success rate for SB with PR was 81.

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Purpose: To characterize the clinical effects of two RP1L1 hotspots in patients with East Asian occult macular dystrophy (OMD).

Methods: Fifty-one patients diagnosed with OMD harboring monoallelic pathogenic RP1L1 variants (Miyake disease) from Japan, South Korea, and China were enrolled. Patients were classified into two genotype groups: group A, p.

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Purpose: To investigate the efficacy, safety, and indications for additional pneumatic retinopexy (PR) in patients with persistent retinal detachment after scleral buckling.

Methods: This retrospective study included patients who underwent additional PR after scleral buckling for primary rhegmatogenous retinal detachment (n = 78). We defined "inadequate buckle" as retinal detachment persistence because of low buckle height despite accurate buckle placement and "buckle misplacement" as an uncovered tear because of incorrect buckle placement.

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Article Synopsis
  • The study investigates the characteristics of subfoveal nodules in Korean patients with Coats disease and how they relate to visual outcomes.
  • Among 12 patients analyzed, 75% had subfoveal nodules, and these patients experienced significantly more severe visual loss and developed macular fibrosis.
  • The findings suggest that the presence of subfoveal nodules predicts worse visual outcomes, highlighting the need for larger studies and treatment approaches for these conditions.
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Introduction: The objective of this study was to investigate the clinical characteristics and genetic spectrum of adult-onset cone/cone-rod dystrophy (AOCD/AOCRD) in Korean individuals.

Methods: This is a single-center, retrospective cross-sectional study. We analyzed 22 individuals with genetically confirmed cone dystrophy, with symptoms beginning after 30 years of age.

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