Search results for "Microkeratome"

showing 9 items of 9 documents

Long-term comparison of corneal aberration changes after laser in situ keratomileusis: mechanical microkeratome versus femtosecond laser flap creatio…

2010

Purpose To compute and compare visual acuity, refractive outcomes, and anterior corneal aberration changes after myopic laser in situ keratomileusis (LASIK) with flap creation by a mechanical microkeratome and by a femtosecond laser. Setting Private practice refractive surgery center, Valencia, Spain. Design Comparative case series. Methods Patients were assigned to have LASIK flap creation with a mechanical microkeratome (Carriazo-Barraquer) or a femtosecond laser (IntraLase). The Visx S2 excimer laser was used for myopic ablation in all cases. Main outcome measures included uncorrected and corrected distance visual acuities and the defocus equivalent. Higher-order aberrations (HOAs) were …

AdultMaleVisual acuityCorneal Wavefront Aberrationgenetic structuresmedicine.medical_treatmentCorneal StromaKeratomileusis Laser In SituVisual AcuityKeratomileusisRefraction OcularSurgical FlapsYoung AdultPostoperative ComplicationsMicrokeratomeRefractive surgeryCorneamedicineMyopiaHumansProspective Studiesmedicine.diagnostic_testbusiness.industryLASIKCorneal TopographyMiddle AgedCorneal topographyeye diseasesSensory SystemsOphthalmologymedicine.anatomical_structurePrivate practiceOptometrySurgeryFemalesense organsmedicine.symptombusinessFollow-Up StudiesJournal of cataract and refractive surgery
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Femtosecond laser versus mechanical microkeratome laser in situ keratomileusis for myopia: Metaanalysis of randomized controlled trials.

2011

Purpose To examine differences in efficacy, accuracy, safety, and changes in aberrations between femtosecond and mechanical microkeratome laser in situ keratomileusis (LASIK) for myopia. Setting Department of Ophthalmology, Shanghai First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China. Design Evidence-based manuscript. Methods Data sources, including PubMed, Medline, EMBASE, and Cochrane Controlled Trials Register, were searched to identify potentially relevant prospective randomized controlled trials. Primary outcome measures were efficacy (uncorrected distance visual acuity ≥20/20), accuracy (±0.50 diopter mean spherical equivalent), and safety (loss of ≥2 l…

Adultmedicine.medical_specialtyCorneal Wavefront Aberrationgenetic structuresDatabases Factualmedicine.medical_treatmentCorneal StromaKeratomileusis Laser In SituVisual AcuityKeratomileusisRefraction OcularSensitivity and Specificitylaw.inventionYoung AdultPostoperative ComplicationsRandomized controlled triallawMicrokeratomemedicineMyopiaHumansRegistriesDioptreRandomized Controlled Trials as TopicEquipment Safetybusiness.industryLASIKReproducibility of ResultsOdds ratioMiddle Agedeye diseasesSensory SystemsConfidence intervalSurgeryOphthalmologyTreatment OutcomeMeta-analysisSurgeryLasers ExcimerbusinessJournal of cataract and refractive surgery
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Femtosecond laser versus mechanical keratome LASIK for myopia.

2005

To assess efficacy, safety, predictability, stability, and changes in corneal higher-order aberrations (CHOAs) and contrast sensitivity (CS) after a femtosecond laser for LASIK and standard LASIK for myopia.Prospective, randomized, comparative clinical study.Two hundred eyes of 100 consecutive patients who underwent LASIK treatment using the VISX S2 laser system. A femtosecond laser for flap creation was used in 100 eyes (50 patients; spherical equivalent [SE], -2.85+/-1.79 diopters [D]), and a mechanical microkeratome was used in 100 eyes (50 patients; SE, -2.90+/-1.63 D).Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest refraction, CS by means of t…

Adultmedicine.medical_specialtyRefractive errorVisual acuitygenetic structuresmedicine.medical_treatmentKeratomileusis Laser In SituVisual AcuityKeratomileusisSurgical FlapsContrast SensitivityCorneaTonometry OcularMicrokeratomemedicineMyopiaHumansProspective StudiesDioptremedicine.diagnostic_testbusiness.industryLasersLASIKCorneal Topographymedicine.diseaseCorneal topographyeye diseasesPhotorefractive keratectomySurgeryOphthalmologyTreatment Outcomesense organsmedicine.symptombusinessOphthalmology
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Contrast sensitivity after LASIK flap creation with a femtosecond laser and a mechanical microkeratome

2007

ABSTRACT PURPOSE: To compare the effects on contrast sensitivity of the IntraLase femtosecond laser for flap creation (IntraLASIK) and standard LASIK for myopia. METHODS: Two hundred eyes of 100 consecutive patients underwent LASIK treatment using the VISX S2 laser system. The femtosecond laser (15 kHz IntraLase) was used for flap creation in 100 eyes (50 patients) and a mechanical microkeratome (Carriazo-Barraquer) was used in 100 eyes (50 patients). Best spectacle-corrected contrast sensitivity was measured before and 6 months postoperatively in the IntraLASIK and mechanical LASIK groups. The IntraLASIK and mechanical LASIKinduced changes in contrast sensitivity were compared under photop…

Adultmedicine.medical_specialtygenetic structuresMesopic visionmedicine.medical_treatmentmedia_common.quotation_subjectKeratomileusis Laser In SituSurgical Flapslaw.inventionContrast SensitivitylawMicrokeratomeOphthalmologymedicineHumansContrast (vision)media_commonbusiness.industryLASIKEquipment DesignRefractive ErrorsLasereye diseasesRefractive Surgical ProceduresSurgeryOphthalmologyTreatment OutcomeFemtosecondSurgerysense organsbusinessSensitivity (electronics)Follow-Up StudiesPhotopic vision
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Intraocular pressure measurements during flap preparation using 2 femtosecond lasers and 1 microkeratome in human donor eyes

2012

Purpose To evaluate and compare intraocular pressures (IOPs) during flap preparations performed using 2 femtosecond lasers and a mechanical microkeratome in human donor globes. Setting University Medical Center Mainz, Mainz, and Euroeyes Clinic Stuttgart, Stuttgart, Germany. Design Experimental study. Methods A cannula was inserted through the optic nerve in human globes. The IOP was obtained continuously during flap preparation using the 60 kHz Intralase femtosecond laser, the 200 kHz Visumax femtosecond laser, or the Amadeus II microkeratome. For each experiment, a normal lamellar flap preparation (regular procedure) and a worst-case procedure (femtosecond laser interface was pressed agai…

Intraocular pressureMaterials sciencebusiness.industryCorneal StromaKeratomileusis Laser In SituLaserModels BiologicalSurgical FlapsTissue DonorsSensory Systemslaw.inventionTonometry OcularOphthalmologyOpticslawMicrokeratomeFemtosecondHumansLasers ExcimerSurgeryUniversity medicalbusinessIntraocular PressureJournal of Cataract and Refractive Surgery
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Comparison of Intraocular Pressure During Corneal Flap Preparation Between a Femtosecond Laser and a Mechanical Microkeratome in Porcine Eyes

2011

To compare the increase in intraocular pressure (IOP) during corneal flap preparation in porcine eyes when using a femtosecond laser or a mechanical microkeratome.The present study was conducted at a university hospital and a private clinic.The vitreous IOP was directly measured with a cannula through the optic nerve in 24 porcine globes (n = 12 for each device). In the first procedure (worst-case procedure), the eye interface was lowered against the globe until abortion of the docking maneuver when using the IntraLase femtosecond laser (Abbott Medical Optics, Santa Ana, CA) or the suction ring was pressed very firmly against the globe when using the Amadeus microkeratome (Ziemer Ophthalmic…

Intraocular pressuremedicine.medical_specialtygenetic structuresSwineCorneal Stromamedicine.medical_treatmentKeratomileusis Laser In SituKeratomileusisSurgical Flapslaw.inventionTonometry OcularlawMicrokeratomeOphthalmologyAnimalsMedicineIntraocular Pressurebusiness.industryUniversity hospitalLasereye diseasesOphthalmologyFemtosecondLasers Excimersense organsbusinessCornea
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Irregularity of the posterior corneal surface after curved interface femtosecond laser-assisted versus microkeratome-assisted descemet stripping auto…

2013

During donor tissue preparation for Descemet stripping automated endothelial keratoplasty (DSAEK), either microkeratome or femtosecond laser can be used for intrastromal cutting. We compared morphological and functional outcomes after DSAEK using both cutting techniques.In this retrospective study, 22 uneventful DSAEK surgeries were reviewed. Eight donor corneas were prepared for DSAEK using the VisuMax femtosecond laser (Carl Zeiss Meditec AG, Jena, Germany). Fourteen corneas were processed using an Amadeus II microkeratome (Ziemer Ophthalmic Systems AG, Port, Switzerland). The postoperative best spectacle-corrected visual acuity was measured. Furthermore, corneal optical coherence tomogra…

MaleMaterials sciencegenetic structuresDonor tissueVisual AcuityCell Countlaw.inventionOpticsOrgan Culture TechniqueslawMicrokeratomeHumansCorneal surfaceAgedRetrospective StudiesAged 80 and overbusiness.industryEndothelium CornealFuchs' Endothelial DystrophyCorneal TopographyMiddle AgedDescemet stripping automated endothelial keratoplastyLaser assistedLasereye diseasesTissue DonorsOphthalmologyFemtosecondFemalesense organsLaser TherapybusinessDescemet Stripping Endothelial KeratoplastyTomography Optical CoherenceBiomedical engineeringCornea
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Evaluation of cut quality using the Amadeus microkeratome with different settings.

2004

Abstract Purpose: To evaluate the quality of keratectomy specimens created with the Amadeus® microkeratome (AMO) using scanning electron microscopy (SEM). Setting: Johannes Gutenberg-University Hospital, Department of Ophthalmology, Mainz, and the Department of Anatomy, Justus Liebig-University, Giessen, Germany. Methods: Corneal cuts were performed in freshly enucleated pig eyes using the Amadeus microkeratome with 9 combinations of oscillation rate and head-advance speed. For the cutting trials, oscillation rates of 8000, 13000, and 18000 rpm and head-advance speeds of 1.0, 2.5, and 4.0 mm/s were chosen. Fifty-four eyes were included, resulting in 9 groups of 6 eyes for each configuration…

Quality Controlbusiness.industryOscillationSwinemedicine.medical_treatmentCorneal StromaKeratomileusis Laser In SituKeratomileusisSurface smoothnessSensory SystemsSurgical FlapsOphthalmologyQuality (physics)OpticsEvaluation Studies as TopicMicrokeratomeRefractive surgerySurface roughnessmedicineMicroscopy Electron ScanningAnimalsSurgerybusinessMathematicsJournal of cataract and refractive surgery
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Irregularity of the posterior corneal surface during applanation using a curved femtosecond laser interface and microkeratome cutting head.

2012

PURPOSE: To evaluate the irregularity of the posterior corneal surface and intrastromal dissection during the preparation of donor tissue for Descemet stripping automated endothelial keratoplasty (DSAEK) using a curved interface femtosecond laser and microkeratome. METHODS: Sixteen human donor corneas unsuitable for transplantation were divided into two groups: a femtosecond (FS) laser group (n=7) using the VisuMax femtosecond laser (Carl Zeiss Meditec) and a microkeratome group (n=9) using the Amadeus II microkeratome (Ziemer Ophthalmic Group). The corneas were fixed on artificial anterior chambers. Horizontal cross-sections were obtained using spectral-domain optical coherence tomography…

medicine.medical_specialtyMaterials sciencegenetic structuresSurface PropertiesCorneal Stromalaw.inventionOpticsOptical coherence tomographylawMicrokeratomeOphthalmologyCorneamedicineHumansCorneal surfaceAged 80 and overmedicine.diagnostic_testbusiness.industryEndothelium CornealDescemet stripping automated endothelial keratoplastyLasereye diseasesTissue DonorsTransplantationOphthalmologymedicine.anatomical_structureFemtosecondSurgeryLasers Excimersense organsbusinessDescemet Stripping Endothelial KeratoplastyTomography Optical CoherenceJournal of refractive surgery (Thorofare, N.J. : 1995)
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