نتایج جستجو برای: refractive error correction
تعداد نتایج: 406131 فیلتر نتایج به سال:
While instrument myopia is known to occur when microscopes are used, little is known about the accommodation response during microscopy, or about the factors which may alter the magnitude of instrument myopia. In addition, there has been no real-time objective measurement of instrument myopia during the microscopy task. Twenty inexperienced subjects and 10 experienced microscopists (average wor...
Modern management of congenital cataracts which interfere with vision consists of early removal of the cataract and correction of the refractive error by contact lenses or glasses (Parks and Hiles, I967; Von Noorden, Ryan, and Maumenee, I970). Skiascopic postoperative refraction of aphakic infants cannot always be performed satisfactorily because the opening is sometimes small and irregular and...
PURPOSE To assess the psychometric properties of the National Eye Institute Refractive Error Quality of Life (NEI-RQL-42) questionnaire in keratoconus and compare these findings to patients with refractive error correction alone. METHODS The Portuguese version of the NEI-RQL-42 Quality of Life questionnaire was completed by 44 patients who had keratoconus before and after implantation of intr...
Background & Objectives: To determine the prevalence rates of refractive errors in Mashhad, Iran Methods: In this population-based study, random cluster sampling was performed on the urban population of Mashhad and of 4453 selected individuals, 70.4% participated in the study. Refractive errors were assessed using cycloplegic refraction in participants who were ≤ 15 years of age and non-cycl...
PURPOSE To determine the prevalence of distance refractive error among Aboriginal people attending eye clinics in remote South Australia. METHODS A clinic-based cross-sectional study was conducted that involved opportunistic sampling of Aboriginal people attending eye clinics in remote South Australia. There were 189 individuals who were invited to participate in the study all of whom underwe...
PURPOSE To evaluate visual acuity, visual function, and prevalence of refractive error among Chinese secondary-school children in a cross-sectional school-based study. METHODS Uncorrected, presenting, and best corrected visual acuity, cycloplegic autorefraction with refinement, and self-reported visual function were assessed in a random, cluster sample of rural secondary school students in Xi...
background : phacoemulsification is one of the best surgical treatments for the cataract. secondary to the technicaladvances in estimating the intraocular lens (iol) power, the refractive errors, one of the most important surgical complications after surgery, is now reduced. currently, two methods of biometry are used to calculate the iol power, ultrasound biometry and optical biometry. both me...
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