Jin A Choi

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—As environments become smart in accordance with advances in ubiquitous computing technology, researchers are struggling to satisfy users' diverse and sophisticated demands. The aim of the present work is to enable multiple persons in a interactive virtual environment to simultaneously and conveniently interact with virtual agents. To this end, we propose a(More)
PURPOSE To assess the relationship between serum level of 25-hydroxyvitamin D (25(OH)D) and refractive error in Korean adolescents. METHODS A total of 2038 adolescent aged 13 to 18 years, who participated in the Korea National Health and Nutrition Examination Survey (KNHANES) from 2008 to 2011 underwent refractive examination using an autorefractor. Serum(More)
PURPOSE The main objective of this study is to determine the anti-inflammatory effect of topical amniotic membrane (AM) suspension on corneal alkali burn compared to topical serum eyedrops. METHODS Thirty eyes from 30 Sprague-Dawley male rats were used. After alkali injuries using 1 N NaOH, the control group (n = 10) received topical PBS four times a day(More)
PURPOSE Allergic conjunctivitis (AC) from an allergen-driven T helper 2 (Th2) response is characterized by conjunctival eosinophilic infiltration. Because curcumin has shown anti-allergic activity in an asthma and contact dermatitis laboratory models, we examined whether administration of curcumin could affect the severity of AC and modify the immune(More)
PURPOSE To investigate the longitudinal changes in corneal topographic indices over time in patients with mild keratoconus (KC) and to determine predictive factors for the increase in corneal curvature. METHODS The authors retrospectively reviewed the data of 94 eyes of patients with mild KC who had undergone computerized videokeratography (Orbscan IIz;(More)
In this paper, we examine the DVD encoding process and the implications this process has video modeling and network traffic analysis. We have assembled a system that allows us to extract the video data from the DVDs as they were encoded for distribution. Analyzing the resulting video trace data, we describe how DVD encodings have evolved over time. In(More)
PURPOSE To investigate the efficacy of umbilical cord serum eyedrops for the treatment of neurotrophic keratitis. DESIGN Prospective noncomparative case series. PARTICIPANTS Twenty-eight eyes of 28 patients with neurotrophic keratitis who were refractory to conventional treatment. METHODS The patients with neurotrophic keraitis were treated with 20%(More)
PURPOSE To investigate the biochemical mechanism of amniotic membrane (AM) suspension on corneal wound healing, particularly on epithelial proliferation and migration. METHODS Human corneal epithelial cells (HCECs) were cultured in media with different concentrations of AM suspension (5% and 30%), Dulbecco's Modified Eagle Medium: Nutrient Mixture F-12(More)
BACKGROUND To investigate the distribution of intraocular pressure (IOP) and refractive errors according to age group in a representative sample of non-glaucomatous Korean adults. METHODS A total of 7,277 adults (≥ 19 years) who participated in the Korea National Health and Nutrition Examination Survey (KNHANES) from 2008 to 2011 underwent ophthalmic(More)