Hassan Hashemi

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PURPOSE To determine the prevalence of amblyopia, strabismus, and refractive errors in children entering school. METHODS In this cross-sectional population-based study, 6-year-old children enrolling in Shahrood schools were randomly sampled. Those with organic blindness or mental retardation were excluded. Ocular alignment, visual acuity, stereopsis,(More)
AIM To determine the prevalence of refractive errors among schoolchildren in urban and rural areas of Dezful County, Iran. METHODS In a cross-sectional study, using random cluster sampling, 5721 Dezful schoolchildren were selected from 39 clusters. The participants in the study totalled 5544; 3673 elementary and middle school students and 1871 high school(More)
AIM To determine the prevalence of the met and unmet need for spectacles and their associated factors in the population of Tehran. METHODS 6497 Tehran citizens were enrolled through random cluster sampling and were invited to a clinic for an interview and ophthalmic examination. 4354 (70.3%) participated in the survey, and refraction measurement results(More)
PURPOSE To determine the age- and gender-specific prevalences of refractive errors in Tehran through a population-based study. METHODS A total of 6497 citizens representing a cross-section of the population of Tehran were sampled from 160 clusters using a stratified, random, cluster sampling strategy. Eligible people were enumerated through a door-to-door(More)
PURPOSE To determine the mean angle kappa and its determinants in the population of Tehran, Iran. METHODS In a cross-sectional survey with random cluster sampling, a total of 442 participants aged >14 years were selected from 4 municipality districts of Tehran for Orbscan acquisitions. Exclusion criteria were history of eye surgery for refractive errors,(More)
PURPOSE To determine the prevalence of refractive errors in Shiraz schoolchildren by age and gender. METHODS For this cross-sectional study, random cluster sampling was carried out from students of the 2008-2009 academic year. After the initial interview, ophthalmic examinations including tests of visual acuity, non-cycloplegic and cycloplegic refraction(More)
PURPOSE To determine the agreement between scanning slit topography (Orbscan II, Bausch & Lomb) and Scheimpflug imaging (Pentacam, Oculus) in corneal elevation, corneal curvature, and anterior chamber depth (ACD) measurements before and after laser refractive surgery for myopia and to compare the postoperative changes seen with these devices. SETTING Noor(More)
PURPOSE To compare the 6-month results of accelerated and standard collagen crosslinking (CXL) treatment of progressive keratoconus. SETTING Noor Eye Hospital, Tehran, Iran. DESIGN Prospective randomized clinical trial. METHODS Two groups of eyes (intervention and control) received corneal collagen crosslinking (CXL) treatment. The intervention group(More)
PURPOSE To determine the distribution of corneal thickness at 6 different points in an Iranian population and find any possible relationship between the thickness values and some independent variables. METHODS As part of the "Tehran Eye Study," 410 people (800 eyes) aged 14 years and older, residing in the first 4 municipality areas of Tehran, were(More)
PURPOSE To determine the distribution of central and peripheral corneal thickness values and its determinants in an Iranian population. METHODS This population-based study was conducted between 2009 and 2010 in Shahroud, with a response rate of 82.2%. Here in, we present the data on central and peripheral corneal thickness in 3890 participants of the(More)