نتایج جستجو برای: uncorrected refraction errors
تعداد نتایج: 150725 فیلتر نتایج به سال:
PURPOSE To evaluate the anatomical and functional results of excimer laser-assisted lamellar keratoplasty (ELLK) in keratoconus patients. SETTING Eye Clinic, University of L'Aquila, L'Aquila, Italy. METHODS This prospective case series comprised patients with keratoconus who had ELLK and were examined preoperatively and 3, 6, 12, and 24 months postoperatively. Outcome measures were uncorrec...
Purpose: To evaluate. long term efficacy, safety and stability of PRK for low and moderate myopia. Methods: 110 patients were treated for myopia up to 6D with the Summit Excimed excimer laser. The optical zone was 5mm in all cases. Manifest t&action. refraction under cycloplegla, comenl haze and comeal topography werc studied at D15, 1. 3, 6. 12. and 24 months after the surgery. Results: 110 pa...
Purpose We assessed changes in age-specific prevalence of refractive error at the time of starting school, by comparing preschool and school age cohorts in Shanghai, China. Methods A cross-sectional study was done in Jiading District, Shanghai during November and December 2013. We randomly selected 7 kindergartens and 7 primary schools, with probability proportionate to size. Chinese children...
Purpose: To evaluate. long term efficacy, safety and stability of PRK for low and moderate myopia. Methods: 110 patients were treated for myopia up to 6D with the Summit Excimed excimer laser. The optical zone was 5mm in all cases. Manifest t&action. refraction under cycloplegla, comenl haze and comeal topography werc studied at D15, 1. 3, 6. 12. and 24 months after the surgery. Results: 110 pa...
The aim of this study was to analyze and compare corneal biomechanics in patients with bilateral keratoconus (KCN) with unilateral Vogt's striae. In this prospective contralateral study, visual acuity, refraction, and corneal biomechanical parameters were evaluated in patients with bilateral KCN with unilateral Vogt's striae using the Ocular Response Analyzer (ORA) (Reichert Inc., Buffalo, NY) ...
PURPOSE To determine the efficacy of INTACS insertion using a femtosecond laser in the treatment of keratoconus and to compare it to the technique using a mechanical spreader. METHODS INTACS were inserted in 10 eyes using the mechanical spreader to create the channels and subsequently on another 20 eyes using the femtosecond laser. Uncorrected (UCVA) and best spectacle-corrected visual acuity...
purpose: to compare long-term results of excimer laser sub-epithelial keratectomy (lasek) and laser in situ keratomileusis (lasik) for low to moderate myopia. methods: in a comparative case series, visual outcomes in 415 lasik-treated eyes (212 patients) and 359 lasek-treated eyes (194 patients) with myopia ranging from -1.5 to -5 diopters (d) and astigmatism up to -2.75 d using a flying spot e...
Purpose: To evaluate. long term efficacy, safety and stability of PRK for low and moderate myopia. Methods: 110 patients were treated for myopia up to 6D with the Summit Excimed excimer laser. The optical zone was 5mm in all cases. Manifest t&action. refraction under cycloplegla, comenl haze and comeal topography werc studied at D15, 1. 3, 6. 12. and 24 months after the surgery. Results: 110 pa...
Background Photorefractive keratectomy (PRK) is at risk of serious complications such as corneal ectasia, which can reduce corrected distance visual acuity. The rate of complications of PRK is higher in patients with atypical topography. Objective To determine the outcomes of photorefractive keratectomy in patients with atypical topography. Methods This cross-sectional study was done in 201...
Purpose. To evaluate the accuracy, efficacy, stability, and safety of photorefractive keratectomy (PRK) enhancement using the Pulzar 213 nm solid-state laser (SSL) with adjunctive Mitomycin C in eyes previously treated with laser assisted in situ keratomileusis (LASIK) with residual error of refraction. Methods. This is a prospective noncomparative case series of 16 eyes of 12 patients who unde...
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