Purpose: To investigate the prevalence of and risk factors associated with dry eye syndrome (DES) in South Korea.
Design: Cross-sectional study.
Methods: In 2010 and 2011, 11,666 subjects, ranging in age from 19 to 95, were randomly selected as nationally representative participants in the Korea National Health and Nutrition Examination Survey (KNHANES).
Purpose: We investigated the correlations between optical quality parameters obtained from the double-pass system and ocular aberrations obtained from the ray-tracing aberrometer in multifocal intraocular lens (IOL) implanted eyes.
Materials And Methods: Twenty eyes from 20 patients were enrolled in this study. Modulation transfer function cutoff frequency, The Strehl ratio, objective scatter index, and objective pseudo-accommodation obtained from the double-pass system were compared with root mean square (RMS) total aberration, RMS higher-order aberration, and spherical aberration obtained from the ray-tracing aberrometer.
Purpose: To evaluate dry eye and meibomian gland dysfunction after cataract surgery.
Design: Prospective observational case series.
Methods: We studied 58 eyes of 48 patients who underwent phacoemulsification and evaluated them preoperatively and at 1 month and 3 months postoperatively.
Purpose: To compare the optical quality measurements obtained from the double-pass system and ocular aberrations, subjective visual acuity, and contrast sensitivity score in pseudophakic eyes.
Methods: Three months after cataract surgery, modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scatter index, and objective pseudoaccommodation obtained from the double-pass system were compared with total aberration, higher-order aberration, and spherical aberration obtained from ray-tracing aberrometer. In addition, parameters of the double-pass system were compared with subjective visual acuity and the contrast sensitivity score.
Purpose: The aim was to introduce the application of a simple technique using high-frequency radiowave electrosurgery in the management of superior limbic keratoconjunctivitis (SLK).
Methods: This study is a prospective, noncomparative, interventional case series analysis. Seven patients (9 eyes) with SLK were recruited from the outpatient clinic of the Department of Ophthalmology, Severance Eye Hospital and Kangbuk Samsung Hospital, Seoul, Korea.
Purpose: To compare concentrations of tear cytokines in 3 groups composed of Sjögren syndrome (SS) dry eye, non-Sjögren syndrome (non-SS) dry eye, and normal subjects. Correlations between ocular surface parameters and tear cytokines were also investigated.
Design: Prospective cross-sectional study.
Background: To compare optical quality, ocular scattering, and higher-order aberrations (HOAs) after laser in-situ keratomileusis (LASIK) versus laser epithelial keratomileusis (LASEK).
Methods: A total of 47 eyes from 47 participants who had undergone LASIK (group I) or LASEK (group II) procedure at least 6 months prior were enrolled. Ocular aberrations and modulation transfer function (MTF) values measured using iTrace, a ray-tracing type aberrometer, were compared to MTF (modulation transfer function) cut-off values, Strehl ratio, and objective indices of scattering obtained using the Objective Quality Analysis System II (OQAS II).
Purpose: To compare visual outcomes and quality in high myopia patients treated using one of three aspheric treatment algorithms based on the NIDEK Advanced Vision Excimer Laser System.
Methods: Sixty eyes of 60 high myopia patients (>-6 diopter) underwent topography-guided (CATz) (20 eyes), wavefront-guided (OPDCAT) (20 eyes), or topography and wavefront-guided (OPA) (20 eyes) laser-assisted sub-epithelial keratectomy. Visual acuity, manifest refraction spherical equivalent (MRSE), ocular and corneal higher order aberrations, corneal asphericity, point spread function (Strehl ratio) and modulation transfer function (MTF) were compared preoperatively and 1, 3 and 6 months postoperatively.
Purpose: To evaluate the health-related quality of life and emotional status of anophthalmic patients.
Design: Prospective, cross-sectional study.
Methods: The study included 134 monocular anophthalmic patients and 48 healthy volunteers who visited the department of Ophthalmology at the Yonsei University College of Medicine, Seoul, Korea, between July and December 2008.
Graefes Arch Clin Exp Ophthalmol
May 2010
Background: To evaluate the changes in aqueous humor cytokine levels following consecutive intravitreal bevacizumab (Avastin, Genentech Inc., San Francisco, CA, USA) injections in eyes with choroidal neovascularization (CNV) due to age-related macular degeneration (AMD).
Method: Aqueous humor samples were collected at the time of intravitreal injection of 1.