نتایج جستجو برای: refractive errors
تعداد نتایج: 157560 فیلتر نتایج به سال:
Comparing selected and all-class teachers Two studies which compared the training and use of a few selected teachers (STs) and use of ‘all class teachers’ (ACTs) or ‘more class teachers’ (MCTs) found that school screening with more teachers (i.e. fewer children screened per teacher) identified more ocular conditions requiring intervention, including refractive error. In both instances, improved...
Refractive errors are a fairly common eye condition worldwide, and the ophthalmologist should be capable of offering the patient both nonsurgical and surgical solutions to their refractive conditions. Nevertheless, currently, refractive surgery training during residency is poor at best. This paper explores recent evidence to suggest that postsurgical results of patients operated on by residents...
Inmaculada Bueno-Gimeno*, Enrique España-Gregori, Andres Gene-Sampedro*, Juan Carlos Ondategui-Parra and Carlos J. Zapata-Rodriguez* *Department of Optics and Optometry and Vision Science University of Valencia, Spain Department of Surgery, University of Valencia University Hospital La Fe, Spain Faculty of Optics and Optometry, University Vision Centre Polytechnic University of Catalonia, Spain...
Ocular growth is essential to the understanding of the development of refractive errors (RE). ÔThe eye is approximately 17 mm long at birth. From birth to age 6, the eye will grow by around 5 mm, will lose 4 dioptres of corneal power and 20 dioptres of lens power. In the general population, there is a preponderance of emmetropes and the prevalence of ‘acquired’ myopia is only 2% by the age of 6...
The field of aberrations of the human eye is moving rapidly, being driven by the desire to monitor and optimise vision following refractive surgery. It is important for ophthalmologists and optometrists to have an understanding of the magnitude of various aberrations and how these are likely to be affected by refractive surgery and other corrections. In this paper, I consider methods used to me...
BACKGROUND/PURPOSE To evaluate the relationship between refractive error and vision-related quality of life in 16-year-old students in Taiwan. METHODS A cross-sectional study was designed for 16-year junior-high-school students in Taiwan. Myopia was defined as a spherical refractive error (SRE) < -0.50 D, hyperopia as SRE > +1.0 D, and emmetropia as SRE -0.5-+1.0 D in the better eye. Vision-r...
Background & Objective: Refractive errors (myopia, hyperopia and astigmatism) could lead to an impaired quality of life affect a large proportion of the population worldwide, irrespective of age, sex and ethnic group. Such refractive errors can be easily diagnosed, measured and corrected with spectacles or other refractive corrections to attain normal vision. Since there is paucity of informati...
PURPOSE To investigate the effect of different levels of refractive blur on real-world driving performance measured under day and nighttime conditions. METHODS Participants included 12 visually normal, young adults (mean age = 25.8 ± 5.2 years) who drove an instrumented research vehicle around a 4 km closed road circuit with three different levels of binocular spherical refractive blur (+0.50...
background: ramadan fasting may alter a variety of physiological parameters which by themselves influence ocular system. here, we review the effects of ramadan fasting on the health and function of the eye. materials and methods: literature records in pubmed/medline, web of science, embase, google scholar, and iran medex databases as well as proceedings of related meetings from january 1986 t...
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