Clinical trials: Astigmatism
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
Myopia, Astigmatism
Clinical Comparison of Two Daily Disposable Toric Lenses
The purpose of this trial was to compare the performance of two contact lenses commercially available for people with astigmatism.
- Trial name
- NCT01362894
- Testing
- nelfilcon A contact lens, etafilcon A contact lens
- Volunteers
- 240 people
- Sponsor
- CIBA VISION
Cataracts, Astigmatism
Investigation of Corneal Aberrations and Visual Outcomes in Patients Implanted With an AcrySof Toric Intraocular Lens (IOL)
A prospective evaluation of postoperative corneal aberrations and visual parameters (e.g. visual acuity) in patients implanted with an AcrySof Toric IOL.
- Trial name
- NCT00878839
- Testing
- Toric
- Sponsor
- Alcon Research
Astigmatism, Myopia
Evaluation of Two Daily Disposable Contact Lenses for Wearers With Astigmatism
The purpose of this trial is to compare the performance of two contact lenses for contact lens wearers with astigmatism.
- Trial name
- NCT01207466
- Testing
- Nelfilcon A investigational contact lens, Nelfilcon A commercial contact lens
- Volunteers
- 95 people
- Sponsor
- CIBA VISION
Myopia, Astigmatism
Prospective Study of Lens Performance of a Monthly Replacement Lens at Two Weeks and Four Weeks
The purpose of this study is to compare the overall performance of a monthly replacement contact lens when worn for one month and when worn for two weeks.
- Conditions
- Myopia, Astigmatism, Presbyopia
- Trial name
- NCT01293240
- Testing
- lotrafilcon B contact lens
- Volunteers
- 117 people
- Sponsor
- CIBA VISION
Astigmatism
Clinical Comparison of Two Silicone Hydrogel Toric Lenses in the US
The purpose of this trial is to compare the performance of two different contact lenses for contact lens wearers with astigmatism.
- Trial name
- NCT01007812
- Testing
- Lotrafilcon B contact lens, Comfilcon A contact lens
- Volunteers
- 50 people
- Sponsor
- CIBA VISION
Astigmatism
Corneal Astigmatism Measurement Study
To assess which commercially available measurement device is most accurate in measuring low (< 1.0 D) degrees of corneal astigmatism.
- Trial name
- NCT00818532
- Where
- United States
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Alcon Research
Cataracts, Astigmatism
Randomized Comparison of the Abbott WHITESTAR Signature System With Ellips Tranversal Ultrasound vs. the Alcon Infiniti With the Ozil Torsional Handpiece in Phacoemulsification: A Contralaterally-Controlled Trial
The purpose of this study is to look at the outcomes of your vision after your cataract surgery based on two different types of equipment that will be used during your surgery.
- Trial name
- NCT01279031
- Testing
- Abbott WHITESTAR Signature System with Ellips Transversal Ultrasound, Alcon Infiniti wiht the OZIL Torsional Handpiece
- Where
- United States
- Volunteers
- 25 people
- Sponsor
- Innovative Medical
Myopia, Astigmatism
Product Performance of a Toric Contact Lens
Product performance of a Bausch \& Lomb Toric Contact Lens compared to Ciba Vision Focus Daily Toric Contact Lens
- Trial name
- NCT00658996
- Testing
- SofLens DD Toric, Ciba Vision Focus Dailies Toric Contact Lens
- Where
- Malaysia
- Volunteers
- 220 people
- Sponsor
- Bausch & Lomb Incorporated
Myopia, Astigmatism
A Study to Evaluate the Safety and Effectiveness of the 217z Laser With Zyoptix for Lasik
A Study to demonstrate the safety and efficacy of wavefront laser refractive surgery treatments for myopia and astigmatism.
- Trial name
- NCT00347997
- Testing
- 217z Laser
- Volunteers
- healthy volunteers welcome
- Sponsor
- Bausch & Lomb Incorporated
Myopia, Astigmatism
A Study to Investigate the Safety and Effectiveness of Aspheric Laser Refractive Surgery Treatments for Myopia
The objective of this study was to compare the safety and effectiveness of two versions of the Bausch \& Lomb Zyoptix Tissue Saving Aspheric Algorithm versus the current Zyoptix Tissue Saving Algorithm when used for myopia and…
- Trial name
- NCT00365677
- Testing
- The Bausch & Lomb Zyoptix Tissue Saving Aspheric algorithm, The Bausch & Lomb Zyoptix Tissue Saving algorithm
- Volunteers
- 127 people, healthy volunteers welcome
- Sponsor
- Bausch & Lomb Incorporated
Cataract Extraction, Corneal Astigmatism
Assessment of Visual Performance in Patients With Low Levels of Astigmatism
To assess visual performance in patients with low levels (0.5-0.75 Diopters) of corneal astigmatism.
- Trial name
- NCT00842231
- Testing
- Visual performance measures
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Alcon Research
Refractive Errors, Astigmatism
Study to Evaluate the Clinical Performance of SynergEyes A2 Hybrid Contact Lenses
This is a multicenter study to evaluate the clinical performance of the SynergEyes A2 lens in patients with refractive errors with or without astigmatism.
- Trial name
- NCT01058629
- Testing
- SynergEyes A2 Hybrid Contact Lens
- Where
- 10 sites in United States
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- SynergEyes, Inc.
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