Farhad Rezvan

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PURPOSE To evaluate mutations in the visual system homeobox gene 1 (VSX1) and superoxide dismutase 1 (SOD1) genes with keratoconus (KTCN), direct sequencing was performed in an Iranian population. METHODS One hundred and twelve autosomal dominant KTCN patients and fifty-two unaffected individuals from twenty-six Iranian families, as well as one hundred(More)
PURPOSE To determine the prevalence of refractive errors among schoolchildren in Northeastern Iran by age and gender. METHODS Using multistage random cluster sampling, 2020 schoolchildren 6-17 years of age were selected for this cross-sectional study. The participants totalled 1551 (response rate 76.8%) elementary and junior high school children (41.5%(More)
BACKGROUND Refractive errors are a common eye problem. Considering the low number of population-based studies in Iran in this regard, we decided to determine the prevalence rates of myopia and hyperopia in a population in Mashhad, Iran. DESIGN Cross-sectional population-based study. PARTICIPANTS Random cluster sampling. Of 4453 selected individuals from(More)
BACKGROUND The prevalence of myopia and hyperopia and determinants were determined in a rural population of Iran. DESIGN Population-based cross-sectional study. PARTICIPANTS Using random cluster sampling, 13 of the 83 villages of Khaf County in the north east of Iran were selected. Data from 2001 people over the age of 15 years were analysed. METHODS(More)
The purpose of this study was to test the measurements of a multifunctional device, the NIDEK OPD-Scan III in terms of repeatability and agreement with retinoscopy and Pentacam in cases with emmetropia, ametropia, and KCN (grade 1–3). We enrolled 170 eyes (40 in each group of emmetropia and ametropia, and 90 in the 3 KCN subgroups). Acquisitions were done(More)
PURPOSE To compare the accuracy of  Sanders-Retzlaff-Kraff II (SRK II) and 3(rd) and 4(th) generation intraocular lens (IOL) formulas and to compare the effect of different anterior chamber depths among the IOL formulas in cataract patients with normal axial length (AL; 22.0-24.5 millimeters, mm). MATERIALS AND METHODS A retrospective chart review was(More)
OBJECTIVE To determine the variations in corneal thickness values, keratometry readings, and anterior chamber depths (ACD) during the menstrual cycle of young women using the noncontact Scheimpflug imaging technique. DESIGN Prospective cohort study. PARTICIPANTS Fourteen women with regular menstrual cycles who were not taking contraceptive pills were(More)
PURPOSE The aim was to determine the agreement between PARK1 pachymetric readings and measurements made with the Pentacam and ultrasonic pachymetry. METHODS In this prospective study, we enrolled refractive surgery patients free of other ocular conditions and performed Pentacam and PARK1 acquisitions followed by ultrasonic pachymetry. We recorded(More)
PURPOSE To determine the prevalence of amblyopia, anisometropia, and strabismus in schoolchildren of Shiraz, Iran. MATERIALS AND METHODS A random cluster sampling was used in a cross-sectional study on schoolchildren in Shiraz. Cycloplegic refraction was performed in elementary and middle school children and high school students had non-cylcoplegic(More)
PURPOSE To determine the number of cataract surgeries per million population per year or the cataract surgical rate (CSR) in Iran for every year from 2000 to 2005 as part of the objectives of the Vision 2020 initiative by the World Health Organization (WHO) to eliminate cataract blindness. METHODS This study is part of the Iranian Cataract Surgery Survey,(More)