background: the aim of this study was to evaluate the results of amblyopia screening in ardabil province in three examination levels by kindergarten teacher, optometrist, and ophthalmologist. methods: in a cross‑sectional study, the results of the national amblyopic prevention program in 2–6 years old children in ardabil province were investigated in 2012. the results pertained to the examinati...

PURPOSE To describe the prevalence and the risk factors of undercorrected refractive error in an adult urban Malay population. METHODS This population-based, cross-sectional study was conducted in Singapore in 3280 Malay adults, aged 40 to 80 years. All individuals were examined at a centralized clinic and underwent standardized interviews and assessment of refractive errors and presenting an...

BACKGROUND The aim of this study was to evaluate the results of amblyopia screening in Ardabil Province in three examination levels by kindergarten teacher, optometrist, and ophthalmologist. METHODS In a cross-sectional study, the results of the national amblyopic prevention program in 2-6 years old children in Ardabil Province were investigated in 2012. The results pertained to the examinati...

BACKGROUND Amblyopia is an acquired defect of vision caused by abnormal visual experience that occurs during childhood. Since early diagnosis is important in preventing further irreparable effects, the aim of this study was to investigate the outcome of amblyopia screening in children. METHODS Data from the amblyopia screening program in the Welfare Department of Bandar Abbas during 2011-2012...

PURPOSE Ordinary spherocylindrical refractive errors have been recognized as a cause of monocular diplopia for over a century, yet explanation of this phenomenon using geometrical optics has remained problematic. This study tests the hypothesis that the diffraction theory treatment of refractive errors will provide a more satisfactory explanation of monocular diplopia. METHODS Diffraction the...

Purpose: To determine the prevalence of refractive condition and its risk factors among students in Mashhad. Methods: A total of 2510 students representing a cross-sectional of the population of Mashhad were sampled using random cluster sampling strategy. Primary and middle school students underwent cycloplegic refraction. The refractive errors of high school students were measured using non-cy...

STUDY OBJECTIVE To study the association between computer use and visual field abnormalities (VFA) and to assess whether heavy computer users have an increased risk of glaucoma. DESIGN Cross sectional multicentre study. Subjects and observation procedures: A total of 10 202 randomly selected Japanese workers (mean (SD) age 43.2 (9.8) years) were screened for VFA using the frequency doubling t...

PURPOSE Human infants exhibit a high prevalence of astigmatism. Although macaque monkeys are commonly used as animal models in experiments on early ocular growth and emmetropization, the prevalence of astigmatism in infant monkeys is unexplored. In this study we examine the prevalence and nature of astigmatism in infant monkeys. METHODS Refractive and corneal astigmatism were measured in 132,...

Refractive errors, myopia and hyperopia, are the most common causes of visual impairment worldwide. Recent advances in genetics have been utilized to identify a wealth of genetic loci believed to contain susceptibility genes for refractive error (RE). The current genetic evidence confirms that RE is influenced by both common and rare variants with a significant environmental component. These st...

PURPOSE We determined the correlation between sibling refractive errors adjusted for shared and unique environmental factors using data from the Collaborative Longitudinal Evaluation of Ethnicity and Refractive Error (CLEERE) Study. METHODS Refractive error from subjects' last study visits was used to estimate the intraclass correlation coefficient (ICC) between siblings. The correlation mode...