Search results for "Toric lens"

showing 8 items of 8 documents

Repeatability of in-vitro optical quality measurements of intraocular lenses with a deflectometry technique effect of the toricity

2018

Aim To evaluate the repeatability of an optical device for measuring the Zernike coefficients of toric intraocular lenses (IOLs) and assess whether its toricity has any impact in its repeatability. Methods An experienced technician used the NIMO TR1504 to measure the Zernike coefficients 30 times for an aperture of 4.50 mm for all lenses included. The IOLs included were divided into two group: toric and non-toric ones. The cylindrical powers of the toric lenses included in the present study were 1.00, 1.50, 2.25, 3.00 and 3.75 D. Finally, the repeatability of the NIMO TR1504 was described in terms of within subject standard deviation (Sw) and repeatability limit. Results The Sw was smaller …

1144ApertureZernike polynomialsmedicine.medical_treatmentintraocular lensIntraocular lensStandard deviationlaw.invention03 medical and health sciencessymbols.namesake0302 clinical medicineOpticslcsh:OphthalmologylawMedicinerepeatabilityoptical qualitybusiness.industryRepeatabilityOptical qualityToric lensLens (optics)Ophthalmologyin-vitro measurementslcsh:RE1-994030221 ophthalmology & optometrysymbolsbusiness030217 neurology & neurosurgeryInternational Journal of Ophthalmology
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Postoperative astigmatism and rotational stability after Artisan toric phakic intraocular lens implantation

2003

Abstract Purpose To evaluate deviations in the axis (intended versus achieved) and postoperative astigmatism after implantation of an Artisan toric phakic intraocular lens (IOL). Setting University Eye Hospital, Mainz, Germany. Methods This prospective study comprised 29 eyes with high ametropia and astigmatism. All eyes had uneventful implantation of a toric phakic IOL through a superior scleral tunnel incision at 12 o’clock. After a minimum of 6 months, the uncorrected visual acuity (UCVA), best correct visual acuity, refraction, and astigmatism were analyzed in all eyes. A multivariate analysis of postoperative astigmatism was performed. Results After a follow-up of at least 6 months, 95…

AdultMaleRefractive errorVisual acuityRotationgenetic structuresmedicine.medical_treatmentEmmetropiaIntraocular lensPhakic intraocular lensLens Implantation IntraocularmedicineHumansPostoperative PeriodProspective StudiesDioptreLenses Intraocularbusiness.industryAstigmatismEquipment DesignMiddle AgedRefractive Errorsmedicine.diseaseeye diseasesSensory SystemsRefractive Surgical ProceduresToric lensOphthalmologyMeridian (perimetry visual field)OptometryFemaleSurgerysense organsmedicine.symptombusinessJournal of Cataract and Refractive Surgery
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Iris-fixated toric phakic intraocular lens: Three-year follow-up

2006

Purpose To evaluate the 3-year safety, efficacy, predictability, and stability of iris-fixated toric phakic intraocular lens (pIOL) implantation for the correction of myopia or hyperopia with astigmatism. Setting Department of Ophthalmology, Johannes Gutenberg University, Mainz, and Department of Ophthalmology, University Clinic, Bochum, Germany. Methods A prospective clinical trial of 40 eyes of 23 patients with high ametropia and astigmatism was conducted. Best spectacle-corrected visual acuity (BSCVA), uncorrected visual acuity, refraction, astigmatism, intraocular pressure, slitlamp biomicroscopy, and indirect ophthalmoscopy were measured preoperatively and postoperatively. Results Of t…

AdultMalemedicine.medical_specialtyIntraocular pressureVisual acuitygenetic structuresmedicine.medical_treatmentVisual AcuityIrisIntraocular lensAstigmatismRefraction OcularPhakic intraocular lensOphthalmoscopyPostoperative ComplicationsLens Implantation IntraocularOphthalmologyLens CrystallineHumansMedicineProspective StudiesIntraoperative ComplicationsIntraocular PressureDioptremedicine.diagnostic_testbusiness.industryAstigmatismMiddle Agedmedicine.diseaseeye diseasesSensory SystemsRefractive Surgical ProceduresOphthalmoscopyToric lensOphthalmologyTreatment OutcomeFemaleSurgerysense organsmedicine.symptombusinessFollow-Up StudiesJournal of Cataract and Refractive Surgery
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Change in pupil size after implantation of an iris-fixated toric phakic intraocular lens

2005

Purpose To evaluate the changes in pupil size after implantation of an iris-supported toric phakic intraocular lens (TPIOL) for correction of myopia and hyperopia with astigmatism. Setting Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany. Methods Twenty-two myopic eyes and 9 hyperopic eyes were included in the study. The mean age of the 2 groups was 34 years and 40 years, respectively. The scotopic pupil size was measured with a handheld infrared pupillometer (Colvard, Oasis Medical) before and 6 months after implantation of the TPIOL. All examinations were performed under scotopic conditions after 2 minutes of dark adaptation with the fellow eye covered. Intraindi…

AdultMalemedicine.medical_specialtygenetic structuresmedicine.medical_treatmentIrisMagnificationIntraocular lensAstigmatismProsthesis DesignPhakic intraocular lensPupilLens Implantation IntraocularOphthalmologyLens CrystallineMyopiaMydriasismedicineHumansIris (anatomy)Lenses Intraocularbusiness.industrySuture TechniquesAstigmatismPupilMiddle Agedmedicine.diseaseeye diseasesSensory SystemsToric lensOphthalmologyHyperopiamedicine.anatomical_structureOptometryFemaleSurgerysense organsmedicine.symptombusinessJournal of Cataract and Refractive Surgery
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Foldable toric intraocular lens for astigmatism correction in cataract patients.

2007

PURPOSE: To evaluate the results of AcrySof toric intraocular lens (IOL) (Alcon) implantation to correct preexisting astigmatism in patients having cataract surgery. SETTING: Ophthalmology Service, Donostia Hospital, San Sebastian, Spain. METHODS: This prospective observational study included 30 eyes of 15 consecutive patients with more than 1.00 diopter (D) of preexisting corneal astigmatism having cataract surgery. Bilateral implantation of the AcrySof toric IOL was performed after phacoemulsification. The uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), residual refractive sphere, residual keratometric and refractive cylinders, and toric IOL axis were measured. RESU…

MaleRefractive errormedicine.medical_specialtygenetic structuresmedicine.medical_treatmentAcrylic ResinsVisual AcuityIntraocular lensAstigmatismRefraction OcularVision disorderLens Implantation IntraocularOphthalmologymedicineHumansProspective StudiesDioptreAgedAged 80 and overLenses IntraocularPhacoemulsificationbusiness.industryAstigmatismPhacoemulsificationCataract surgeryMiddle Agedmedicine.diseaseeye diseasesSensory SystemsToric lensOphthalmologyOptometrySurgeryFemalesense organsmedicine.symptombusinessJournal of cataract and refractive surgery
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Toric intraocular lens versus opposite clear corneal incisions to correct astigmatism in eyes having cataract surgery.

2009

To compare toric intraocular lens (IOL) implantation with paired opposite clear corneal incisions (OCCIs) for astigmatism correction in patients having cataract surgery.Ophthalmology Service, Donostia Hospital, San Sebastián, Spain.This randomized prospective clinical study comprised eyes with more than 1.00 diopter (D) of preexisting corneal astigmatism. One group had AcrySof toric IOL implantation and the other, paired 2.75 mm/3.20 mm OCCIs in the steep axis with spherical IOL implantation. Uncorrected (UCVA) and best corrected (BCVA) visual acuity, refraction, corneal and total higher-order aberrations (HOAs), photopic and mesopic contrast sensitivity, and toric IOL axis were measured 3 …

Malemedicine.medical_specialtyRefractive errorgenetic structuresmedicine.medical_treatmentVisual AcuityIntraocular lensAstigmatismContrast SensitivityCorneaPostoperative ComplicationsLens Implantation IntraocularOphthalmologymedicineHumansProspective StudiesIntraoperative ComplicationsDioptreAgedLenses IntraocularPhacoemulsificationmedicine.diagnostic_testbusiness.industryAstigmatismCorneal TopographyPhacoemulsificationCataract surgeryCorneal topographymedicine.diseaseeye diseasesSensory SystemsToric lensOphthalmologySurgeryFemalesense organsbusinessJournal of cataract and refractive surgery
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Implantation of a toric poly(methyl methacrylate) intraocular lens to correct high astigmatism

1999

Abstract A 57-year-old man experienced a decrease in visual function because of cataract formation. Corneal astigmatism was 13.4 diopters (D) because he had had a penetrating keratoplasty 27 years before. Cataract surgery was planned, and biometric data for toric intraocular lens (IOL) implantation were collected for the manufacture of a custom IOL. After phacoemulsification, a toric poly(methyl methacrylate) (PMMA) IOL of +19.0 D spherical and +12.0 D cylindrical power was implanted via a sclerocorneal tunnel incision. Three months postoperatively, corneal astigmatism was 14.3 D and best corrected visual acuity (BCVA), 20/25. Postoperative refraction (+1.5 −3.0 × 90) and BCVA remained stab…

Malemedicine.medical_specialtyRefractive errorgenetic structuresmedicine.medical_treatmentVisual AcuityIntraocular lensAstigmatismRefraction OcularCataractCorneaHigh astigmatismLens Implantation IntraocularOphthalmologyHumansPolymethyl MethacrylateMedicineDioptreLenses IntraocularPhacoemulsificationbusiness.industryAstigmatismCorneal TopographyPhacoemulsificationMiddle AgedCataract surgeryequipment and suppliesmedicine.diseaseeye diseasesSensory SystemsSurgeryToric lensOphthalmologySurgerysense organsbusinessJournal of Cataract and Refractive Surgery
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Toric phakic intraocular lens

2003

Abstract 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 years) with preoperative spherical equivalent between +6.50 and −21.25 diopters (D) and cylinder between 1.50 and 7.25 D. Methods Seventy eyes underwent implantation of a TPIOL with an optical zone of 5.0 mm (Artisan, Ophtec, Groningen, The Netherlands). The dioptric power of the intraocular lens…

medicine.medical_specialtyRefractive errorVisual acuitygenetic structuresKeratometerbusiness.industrymedicine.medical_treatmentIntraocular lensAstigmatismmedicine.diseasePhakic intraocular lenseye diseaseslaw.inventionToric lensOphthalmologylawOphthalmologymedicinesense organsmedicine.symptombusinessDioptreOphthalmology
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