نتایج جستجو برای: uncorrected refraction errors
تعداد نتایج: 150725 فیلتر نتایج به سال:
OBJECTIVE To evaluate safety, efficacy, predictability, stability, complications, and patient satisfaction after implantation of Artisan toric phakic intraocular lenses (TPIOLs) for the correction of myopia or hyperopia with astigmatism. DESIGN Prospective, nonrandomized, comparative (self-controlled) multicenter trial. PARTICIPANTS Seventy eyes of 53 patients (mean, 35 years; range, 22-59 ...
PURPOSE To conduct a clinical validation of a virtual reality-based experimental system that is able to assess the spherical subjective refraction simplifying the methodology of ocular refraction. METHODS For the agreement assessment, spherical refraction measurements were obtained from 104 eyes of 52 subjects using three different methods: subjectively with the experimental prototype (Subj.E...
We present a patient with marginal corneal degeneration and corneal astigmatism of more than 10.0 diopters (D). A toric phakic intraocular lens (IOL) of 7.0 D cylindrical power was implanted in both eyes to correct the high astigmatism. An uncorrected visual acuity of 20/40 was achieved in both eyes, and the best corrected visual acuity improved by 4 Snellen lines to 20/20 in both eyes. Refract...
We report the refractive correction of high astigmatism in one eye of a 23-year-old woman following deep anterior lamellar keratoplasty (DALK) using an Artisan iris-fixated, toric, phakic intraocular lens (IOL). One year after implantation, uncorrected and corrected distance visual acuities were both 20/25, refraction was -1.00 D cylinder, and the endothelial cell count was 1827 cells/mm(2). Ir...
PURPOSE To compare the visual outcomes after cataract surgery with bilateral implantation of 1 of 2 diffractive trifocal intraocular lenses (IOLs). SETTING Two clinical centers, Lisbon, Portugal. DESIGN Prospective comparative case series. METHODS Phacoemulsification with bilateral implantation of a Finevision Micro F IOL (Group 1) or an AT Lisa tri 839 MP IOL (Group 2) was performed. Ove...
OBJECTIVES To compare the results of phaco-emulsification cataract surgery and manual small-incision cataract surgery. METHODS Consecutive patients aged >50 years undergoing surgery for age-related cataract were recruited into a randomised prospective clinical trial. Randomisation was done using opaque sequentially numbered envelopes opened by the surgeon immediately prior to surgery. The pat...
PURPOSE To evaluate refractive and visual parameters related to distance, intermediate, and near vision after cataract surgery and the optical quality of a new diffractive trifocal intraocular lens (IOL). SETTING Vissum Instituto Oftalmologico de Alicante, Alicante, Spain. DESIGN Case series. METHODS Patients had bilateral refractive lens exchange and multifocal diffractive IOL (AT Lisa t...
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