- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT00769808
Technolas 217z Laser With Zyoptix Aspheric Algorithm Used for the LASIK Treatment of Myopia and Myopic Astigmatism.
24 août 2020 mis à jour par: Bausch & Lomb Incorporated
A Prospective Trial to Evaluate the Safety and Effectiveness of the Bausch & Lomb Technolas® 217z Laser With Zyoptix® Aspheric Algorithm When Used for the LASIK Treatment of Myopia and Myopic Astigmatism
The purpose of this study is to evaluate the safety and effectiveness of the Bausch & Lomb Technolas 217z laser with the investigational Zyoptix Aspheric Algorithm when used for LASIK treatment of myopia and myopic astigmatism.
Aperçu de l'étude
Statut
Complété
Les conditions
Intervention / Traitement
Type d'étude
Interventionnel
Inscription (Réel)
72
Phase
- N'est pas applicable
Contacts et emplacements
Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.
Lieux d'étude
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Ontario
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Toronto, Ontario, Canada, M5X1C8
- Lasik MD, 130 King Street
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Critères de participation
Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.
Critère d'éligibilité
Âges éligibles pour étudier
18 ans et plus (Adulte, Adulte plus âgé)
Accepte les volontaires sains
Non
Sexes éligibles pour l'étude
Tout
La description
Inclusion Criteria:
- Subjects who were of legal age (at least 18) and had full legal capacity to volunteer.
- Subjects must be willing to have both eyes treated with the laser.
- Subjects must have up to -12.00D of absolute spherical myopia (not spherical equivalent) with up to -6.00D of refractive astigmatism, with a spherical equivalent up to -15.00D as measured by manifest subjective refraction.
- Subjects who had less than 0.75 D of difference in the preoperative manifest spherical equivalent and cycloplegic spherical equivalent subjective refractions.
(Manifest subjective refractions adjusted for optical infinity were used.)
- High contrast, manifest best spectacle-corrected distance logMAR visual acuity correctable to at least 0.3 in both eyes, and must not differ between eyes by more than 1 line (5 letters).
- Contact lens wearers must have 2 Orbscan measurements and 2 manifest subjective refractions taken preoperatively at least 1 week apart.
- Contact lens wearers must have gas permeable lenses discontinued for at least 3 weeks and soft lenses discontinued for at least 2 weeks prior to the preoperative evaluation.
Exclusion
- Subjects with uncorrected visual acuity better than 20/40 (Snellen) or 0.3 logMAR
- Subjects who were immuno-compromised or had a diagnosis of connective tissue disease, clinically significant atopic disease, diabetes, autoimmune diseases and other acute or chronic illnesses that increased the risk to the subject or could have confounded the outcomes of this study.
- Subjects with uncontrolled glaucoma or glaucoma who were under treatment in the study eye or with ocular hypertension.
- Subjects who demonstrated evidence of retinal vascular disease.
- Subjects who have an ocular muscle disorder including strabismus or nystagmus, or other disorders that affected fixation.
- Subjects who were at risk for angle closure or who had a potentially occludable angle, as evidenced by a shallow anterior chamber on slit lamp exam, confirmed by gonioscopy as deemed necessary by the study Investigator.
- Subjects who had undergone previous intraocular or corneal surgery of any kind, including any type of excimer laser surgery for either refractive or therapeutic purposes.
- Subjects who were taking systemic medications likely to affect wound healing such as corticosteroids or anti-metabolites or any other medications that may increase the risk to the subject or confound the outcomes of this study.
- Subjects for whom the combination of their preoperative corneal thickness and the planned operative parameters for the LASIK procedure could have resulted in less than 250 microns of remaining posterior corneal thickness below the flap postoperatively.
Plan d'étude
Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: N / A
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
---|---|
Expérimental: Technolas 217z Excimer Laser
Bausch & Lomb Zyoptix Aspheric Algorithm for LASIK correction of myopia and myopic astigmatism.
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LASIK correction of myopia and myopic astigmatism
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Percentage of Eyes With Uncorrected High Contrast Distance Visual Acuity of 20/40 or Better
Délai: 3 months
|
3 months
|
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Percentage of Eyes With Manifest Subjective Refraction (MRSE) Within ± 1.00 Diopter (D) and 0.50 D of Emmetropia
Délai: 3 months
|
Manifest refractions (eyeglass prescriptions) have three components: sphere, cylinder, and axis.
Sphere and cylinder are both expressed in diopters, which is a continuous measure of the focusing power needed to make the image sharp on the retina.
Manifest refraction spherical equivalent (MRSE) is equal to sphere + ½ x cylinder.
It is expressed in diopters (D).
|
3 months
|
Preservation of Manifest Best Corrected High Contrast Distance Visual Acuity
Délai: Baseline, 3 months
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Mean change in best-corrected high contrast distance visual acuity.
Corrected means spectacle corrected.
Visual acuity (VA) was reported as letters read correctly, and the letters read were converted to logarithm of the minimum angle of resolution (logMAR) acuity.
The participant read rows of letters on a standard LogMAR chart until the participant misses 3 letters on a row with 5 letters.
The total number of correct letters were recorded.
A decrease in the number of correct letters indicates a decrease in visual acuity.
Acuity was averaged across visits.
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Baseline, 3 months
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Percentage of Eyes With Manifest Best-corrected Distance Photopic Visual Acuity Decrease of 2 or More Lines
Délai: 3 months
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3 months
|
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Percentage of Eyes With > 2.00 Diopter of Induced Postoperative Refractive Cylinder
Délai: 3 months
|
Manifest refractions (eyeglass prescriptions) have three components: sphere, cylinder, and axis.
Sphere and cylinder are both expressed in diopters, which is a continuous measure of the focusing power needed to make the image sharp on the retina.
Manifest refraction spherical equivalent (MRSE) is equal to sphere + ½ x cylinder.
It is expressed in diopters (D).
|
3 months
|
Percentage of Eyes That Had High Contrast Best Spectacle Corrected Visual Acuity (HCBSCVA) of 20/20 or Better at Baseline Had a Visual Outcome Worse Than 20/40 at 3 Months
Délai: 3 months
|
Corrected means spectacle corrected.
Visual acuity (VA) was reported as letters read correctly, and the letters read were converted to logarithm of the minimum angle of resolution (logMAR) acuity.
The participant read rows of letters on a standard LogMAR chart until the participant misses 3 letters on a row with 5 letters.
The total number of correct letters were recorded.
A decrease in the number of correct letters indicates a decrease in visual acuity.
Acuity was averaged across visits.
|
3 months
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Percentage Change From Baseline in Higher Order Aberrations.
Délai: Baseline, 3 months
|
The aberrations in the eye's optical system were measured over the entire pupil by the Bausch & Lomb Zywave II WaveFront Aberrometer, a Hartmann-Shack type device.
The pupil should have been at least 6 mm in diameter using 2.5% phenylephrine as a dilating agent to maximize the pupil diameter and hence the amount of wavefront information collected by the Zywave II.
The wavefront data was then fitted with Zernike polynomials representing the 2nd, 3rd, 4th and 5th order Zernike terms.
These terms represent the wavefront aberration of the eye.
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Baseline, 3 months
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Collaborateurs et enquêteurs
C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.
Parrainer
Les enquêteurs
- Chercheur principal: Mark Cohen, MD, Lasik MD
Dates d'enregistrement des études
Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.
Dates principales de l'étude
Début de l'étude
1 août 2008
Achèvement primaire (Réel)
1 mars 2010
Achèvement de l'étude (Réel)
1 mars 2010
Dates d'inscription aux études
Première soumission
8 octobre 2008
Première soumission répondant aux critères de contrôle qualité
8 octobre 2008
Première publication (Estimation)
9 octobre 2008
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
11 septembre 2020
Dernière mise à jour soumise répondant aux critères de contrôle qualité
24 août 2020
Dernière vérification
1 août 2020
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 564
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .
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