purpose : to determine the prevalence of refractive errors, strabismus and amblyopia in the schoolboys of varamin city, iran methods : in a cross-sectional population-based study in 2010, we used random cluster sampling to select the participants from varamin high school students. examinations were conducted at the school site under standard conditions. all students had non-cycloplegic refracti...

Human face-recognition processes must maintain high levels of performance under different viewing conditions. An important dimension of variability is image resolution, which is affected by distance, refractive errors, and light levels. Here, we investigate how changes in resolution modulate the visual-system's ability to detect featural versus configural changes in face images. It has been sug...

The World Health Organization informal planning meeting, in July 2000, clearly indicated that detailed comparisons of refractive error prevalence across study reports are generally not possible because of different measurement methods and definitions. Further, because most studies are carried out using samples of unknown representativeness, interpretation of the findings in a population-based c...

purpose: to evaluate refractive state in patients with unilateral congenital nasolacrimal duct obstruction. methods: in this descriptive prospective study, patients with unilateral congenital nasolacrimal duct obstruction scheduled for surgery were enrolled over a period of two years (2007-2009). cycloplegic refractive error in both eyes was measured under anesthesia before surgery (probing, si...

purpose: to determine the correlation between hand dominancy and eye dominancy with visual acuity and refraction in subjects with refractive errors. methods: this cross-sectional study includes 620 patients undergoing lasik. their refractive error (dry and cycloplegic), hand dominancy, eye dominancy (by hole-in-the-hand method) and visual acuity were determined. exclusion criteria were monocula...

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...

These include: References http://bjo.bmjjournals.com/cgi/content/full/90/5/521#BIBL This article cites 27 articles, 14 of which can be accessed free at: Rapid responses http://bjo.bmjjournals.com/cgi/eletter-submit/90/5/521 You can respond to this article at: service Email alerting top right corner of the article Receive free email alerts when new articles cite this article sign up in the box a...