Clinical trials: Astigmatism,
Presbyopia, Myopia
Intrastromal Correction of Ametropia by a Femtosecond Laser
This study evaluates the intrastromal correction of ametropia with a femtosecond laser made by 20/10 PERFECT VISION. This laser generates a beam of ultrashort, infrared pulses which enables very precise cuts in the cornea.
- Conditions
- Presbyopia, Myopia, Hyperopia, Astigmatism
- Trial name
- ISCAF (NCT00928122)
- Testing
- Intrastromal Correction of Presbyopia, Intrastromal correction of Myopia, Intrastromal Correction of Hyperopia
- Where
- 3 sites in Germany
- Volunteers
- 200 people
- Sponsor
- 20/10 Perfect Vision
Ocular Surface Disease, Irregular Astigmatism
Evaluation of the Safety and Efficacy of Rigid Breathable Scleral Contact Lenses for the Correction of Ametropia
To evaluate the short-term efficacy and safety of scleral contact lens in the clinical treatment of patients with irregular astigmatism after corneal transplantation by analyzing ocular parameters and ocular surface conditions of…
- Conditions
- Ocular Surface Disease, Irregular Astigmatism, Contact Lens Complication, Corneal Astigmatism
- Trial name
- NCT06256770
- Where
- China
- Volunteers
- 176 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Cataract, Presbyopia
Visual Results of the Acrysof IQ Vivity Toric Extended Vision Intraocular Lens
The main goal of this study is to evaluate real-world visual outcomes, rotational stability, and patient reported visual disturbances with a non-diffractive extended vision presbyopia and astigmatism correcting intraocular lens…
- Conditions
- Cataract, Presbyopia, Corneal Astigmatism
- Trial name
- NCT04652037
- Testing
- Acrysof IQ Vivity Toric Extended Vision Intraocular Lens Implantation
- Where
- Canada
- Volunteers
- 20 people
- Sponsor
- Centre hospitalier de l'Université de Montréal (CHUM)
Myopia, Astigmatism
Evaluation of Outcomes Following LASIK Surgery Using CustomVue
The aim of the study was to evaluate visual outcomes, contrast sensitivity, glare and induced high order aberrations induced by the new CustomVue software use for wavefront-guided LASIK.
- Conditions
- Myopia, Astigmatism, Myopic Astigmatism
- Trial name
- NCT00366769
- Testing
- Wavefront-guided LASIK using CustomVue platform
- Volunteers
- 30 people
- Sponsor
- Medical University of South Carolina
Cataract, Astigmatism
Evaluation of Toric Intraocular Lens(IOL) Combined With Capsular Tension Ring(CTR) in Patients With Cataract Combined With High Myopia
The objective of this study is to evaluate the postoperative visual quality and IOL stability in patients with cataracts and high myopia who have undergone surgery using astigmatism-correcting IOLs in conjunction with tension…
- Conditions
- Cataract, Astigmatism, Intraocular Lens Rotation
- Trial name
- NCT06571773
- Testing
- intraoperative implantation of Capsular Tension Ring, none intraoperative implantation of CTR
- Where
- China
- Volunteers
- 72 people
- Sponsor
- Shanghai 10th People's Hospital
Keratoconus
Astigmatism in Keratoconus Patients
Keratoconus is a bilateral (but usually asymmetrical) non-inflammatory progressive thinning process of the cornea. It manifests as characteristic cone-like ectasia of the cornea associated with irregular stromal thinning…
- Trial name
- NCT03450213
- Testing
- Pentacam
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Assiut University
Pediatric Cataract, Congenital Cataract
Toric Intraocular Lens Implantation for Pediatric Aphakia
Here, we conducted a nonrandomized clinical trial aims to evaluate and compare the prognosis of visual function in children of these two types of IOL implantation over a three-year postoperative period.
- Trial name
- NCT07088796
- Testing
- Toric IOL implantation, Non-toric IOL implantation
- Where
- China
- Volunteers
- 236 people
- Sponsor
- Eye & ENT Hospital of Fudan University
Keratoconus, High Myopia
Anterior Segment and Corneal Parameters in Keratoconus and High Myopic Astigmatism Using Schiempflug Imaging
The purpose of this study was to compare Scheimpflug corneal tomography findings in keratoconus and high myopic astigmatic eyes, as well as to establish the parameters distinguishing keratoconus from high myopic astigmatism.
- Trial name
- NCT06739018
- Testing
- pentacam scheimpflug tomography
- Where
- 2 sites in Egypt
- Volunteers
- 66 people
- Sponsor
- Assiut University
Presbyopia, Hyperopia
Multicenter Evaluation of Safety and Effectiveness of Presbyopic LASIK for Hyperopes
The Presbyopia Algorithm subject to this study has been specifically developed to prospectively generate a treatment file for the Technolas 217z100 laser that will provide Presbyopia correction among eyes with primary hyperopia…
- Trial name
- PresbyLASIK (NCT00910403)
- Testing
- LASIK
- Where
- 4 sites in France, Spain
- Volunteers
- 80 people
- Sponsor
- Technolas Perfect Vision GmbH
Myopia, Hyperopia
DAILIES TOTAL1® Soft Contact Lenses - Post-Market Clinical Follow-up Study
The purpose of this study is to continuously assess the visual performance and safety of DAILIES TOTAL1 soft contact lenses in a real world setting and broader patient base through routine clinical practices.
- Conditions
- Myopia, Hyperopia, Presbyopia, Astigmatism
- Trial name
- NCT06483113
- Testing
- Delefilcon A spherical soft contact lenses, Delefilcon A toric soft contact lenses, Delefilcon A multifocal soft contact lenses
- Where
- 12 sites in United States
- Volunteers
- 192 people
- Sponsor
- Alcon Research
Refractive Error, Myopia
Silicone Hydrogel Contact Lens Clinical and Comfort Benefits With a Multi-Purpose Disinfecting Solution
The purpose of this study was to compare lens comfort on Day 30 for Air Optix® lenses cared for with OPTI-FREE® PureMoist® (OFPM) Multi Purpose Disinfecting Solution (MPDS) compared to Acuvue® Oasys® lenses cared for with…
- Conditions
- Refractive Error, Myopia, Hyperopia, Astigmatism
- Trial name
- NCT01809197
- Testing
- Lotrafilcon B contact lenses, Senofilcon A contact lenses, OPTI-FREE PureMoist Multi-Purpose Disinfecting Solution (MPDS)
- Volunteers
- 387 people
- Sponsor
- Alcon Research
Astigmatism
Clinical Performance of Atypical Contact Lens Powers on Subjects With Astigmatism
This study will evaluate the fitting characteristics and physiological response of two toric lenses manufactured by Vistakon.
- Trial name
- NCT00697190
- Testing
- senofilcon A toric, galyfilcon A toric
- Where
- United Kingdom
- Volunteers
- 39 people
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Astigmatism, Presbyopia
Comparing Biofinity Toric Multifocal to Ultra Multifocal for Astigmatism
The objective of the study was to compare the handling and performance of Biofinity Toric Multifocal to Ultra Multifocal for Astigmatism.
- Trial name
- NCT04404725
- Testing
- comfilcon A, Samfilcon A
- Where
- 7 sites in United States, Canada
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Myopia
Evaluation of Conventional Photorefractive Keratectomy (PRK) in U.S. Army Personnel, Substudy of: Initial Evaluation of Excimer Laser Keratorefractive Surgery in U.S. Army Personnel
The purpose of this study is to: 1. evaluate the safety and efficacy of conventional PRK in U.S. Army personnel who have naturally occurring myopia with or without astigmatism. 2.
- Trial name
- NCT00412568
- Testing
- Photorefractive Keratectomy (PRK)
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Walter Reed Army Medical Center
Astigmatism
Performance Evaluation of Two Daily Disposable Toric Lens Designs in Habitual Soft Contact Lens Wearers
The objective of the study is to compare the clinical performance of two different daily disposable, SiHy toric contact lens types, Lens A and Lens B, in existing soft lens wearers when worn for one week each.
- Trial name
- NCT04831515
- Testing
- Lens A, Lens B
- Where
- 4 sites in United States
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Astigmatism
Comparison of Comfilcon A Toric Contact Lenses and Samfilcon A Toric Contact Lenses
The objective of this study is to evaluate the subjective acceptance of comfilcon A toric contact lens, compared to samfilcon A toric lens.
- Trial name
- NCT03519932
- Testing
- comfilcon A toric lens, samfilcon A toric lens
- Where
- Canada
- Volunteers
- 49 people
- Sponsor
- CooperVision, Inc.
Aphakia, Corneal Astigmatism
Evaluation of the Safety and Performance of the HARMONI® Toric Lens
The purpose of this study was to evaluate the safety and effectiveness of the HARMONI® Modular Intraocular Lens System with a toric optic (HMTIOL) in subjects with pre-existing corneal astigmatism in need of cataract surgery.
- Conditions
- Aphakia, Corneal Astigmatism, Cataract
- Trial name
- NCT03050697
- Testing
- HARMONI® Modular Toric Intraocular Lens, Cataract extraction with intraocular lens (IOL) implantation
- Where
- New Zealand
- Volunteers
- 16 people
- Sponsor
- ClarVista Medical
Cataracts, Astigmatism
AcrySof Toric Clinical Results
This study is an evaluation of visual outcomes of subjects implanted with the AcrySof Toric Intraocular Lenses (IOLs) Models SN60T3, SN60T4, and SN60T5.
- Trial name
- NCT01214863
- Testing
- T3, T4, T5
- Where
- United States
- Volunteers
- 144 people
- Sponsor
- Alcon Research
Cataract, Astigmatism
Observational Prospective Clinical Investigation on Monofocal Toric Intraocular Lens
Evaluation, at least one-year long-term, of the clinical performance and safety of Mini Toric Ready Intraocular Lens (IOL), a monofocal toric intraocular lens.
- Trial name
- NCT06250855
- Testing
- Mini Toric IOL
- Where
- 2 sites in Romania
- Volunteers
- 105 people
- Sponsor
- SIFI SpA
Astigmatism
A Clinical Comparison of 2 Multifocal Toric XR (Extended Range) Contact Lenses
This study aims to compare the clinical performance and subjective acceptance of the comfilcon A and the omafilcon B soft contact lenses.
- Trial name
- NCT03006458
- Testing
- comfilcon A, omafilcon B
- Where
- United Kingdom
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.