Clinical trials: Error, Refractive
Myopia
Characterization of the Corneal Biomechanics of Patients Treated by Corneal Lenticule Extraction for Advanced Refractive Correction (CLEAR) to Correct Myopia
This study aims to perform biomechanical tests on extracted CLEAR lenticles that are routinely discarded after surgery. The investigators also aim to perform Brillouin microscopy to get an in-vivo assessment of the patient's…
- Trial name
- CLEAR Biomech (NCT04817592)
- Testing
- Corneal lenticule extraction for advanced refractive correction (CLEAR)
- Where
- Switzerland
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Bern
Myopia, Astigmatism
Multi Laser Platform Comparison Study for LASIK
Comparison of LASIK outcomes using 3 different lasers and a total of 5 different treatment platforms.
- Trial name
- VBLWL-001 (NCT00770094)
- Testing
- Excimer Lasers, Excimer Laser for the LASIK procedure, Excimer Laser for LASIK
- Where
- 3 sites in United States
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Durrie Vision
Primary Pterygium, Astigmatism
Preoperative and Postoperative Refractive and Topographic Evaluation in Patients With Primary Pterygium: Comparison of Two Surgical Techniques
This study evaluated changes in refractive status and corneal topography before and after surgical treatment of primary pterygium.
- Trial name
- RETOP (NCT07742995)
- Testing
- Conjunctival Autograft, Amniotic Membrane Transplantation
- Volunteers
- 78 people
- Sponsor
- Instituto de Oftalmología Fundación Conde de Valenciana
Cataract, Hyperopia
Visual Outcomes and Patient Satisfactory After PanOptix Implantation in Hyperopic Cataract Patients
To evaluate visual outcomes and patient satisfactory after PanOptix implantation in hyperopic cataract patients
- Trial name
- NCT05716269
- Volunteers
- 44 people
- Sponsor
- Peking University Third Hospital
Presbyopia, Pseudophakia
Synergy Lens Outcomes Evaluation
This is a single visit study to evaluate the visual outcomes and patient satisfaction of patients who were bilaterally implanted with the Tecnis Synergy IOL between June 1 and December 31, 2021 in 2 centers in USA
- Trial name
- NCT05418153
- Testing
- Tecnis Synergy IOL
- Where
- 2 sites in United States
- Volunteers
- 52 people
- Sponsor
- Center For Sight
Astigmatism
Rotation Stability of Toric Intraocularlens (IOL) Compared Sitting Against Lying After Cataract Operation
To assess the rotation stability of toric intraocular lenses between sitting or routine settings (sitting, going around) after cataract operation.
- Trial name
- NCT04776057
- Testing
- catarct surgery with toric intra ocular lenses
- Where
- Austria
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Prim. Prof. Dr. Oliver Findl, MBA
Cataracts, Glaucoma
Family Studies of Eye Traits
This study will examine blood specimens from patients with various eye disorders who previously participated in the Beaver Dam Eye Study to try to identify genes responsible for these disorders.
- Conditions
- Cataracts, Glaucoma, Myopia
- Trial name
- NCT00342342
- Where
- 5 sites in United States
- Volunteers
- 7,370 people
- Sponsor
- National Human Genome Research Institute (NHGRI)
Astigmatism, Presbyopia
A Clinical Comparison of Two Multifocal Toric Soft Contact Lenses
This study aims to compare the short-term clinical performance of the two study contact lenses.
- Trial name
- NCT06438601
- Testing
- Lens A (omafilcon A), Lens B (comfilcon A)
- Where
- United Kingdom
- Volunteers
- 36 people
- Sponsor
- CooperVision, Inc.
Myopia, Hypermetropia
Comparison Between Myopia Versus Hypermetropia With Progressive Addition Lenses in Computer Users
This study examines how myopia (nearsightedness) and hyperopia (farsightedness) affect the use of progressive addition lenses (PALs) for computer users.
- Trial name
- NCT06484257
- Testing
- Myopia, Hypermetropia
- Where
- Pakistan
- Volunteers
- 64 people
- Sponsor
- Superior University
Myopia
Visual Performance of Highly Aspherical Lenslet Spectacles in Children (Ancillary to WS10246)
To evaluate the visual performance of (high and low contrast distance visual acuity, reading speed, near visual acuity, and near contrast sensitivity) of HAL spectacle lenses (habitual correction) in comparison with single vision…
- Trial name
- FIN-3102 (NCT07668102)
- Testing
- HAL spectacle lens, Single Vision spectacle lens
- Where
- 7 sites in United States
- Volunteers
- 88 people
- Sponsor
- Essilor International
Myopia
Evaluation of Corneal Irregular Astigmatism and Visual Quality Following Bilateral Sequential Small Incision Lenticule Extraction (SMILE) and Laser Subepithelial Keratomileusis (LASEK): A Six-Year Comparative Study
To compare the corneal spherical component (SC), regular astigmatism (RA), irregular astigmatism (IA, including Asymmetry and Irregularity) and visual quality six years after small incision lenticule extraction (SMILE) and laser…
- Trial name
- SMILE LASEK (NCT06673992)
- Testing
- This study does not involve any interventions
- Where
- China
- Volunteers
- 71 people
- Sponsor
- Shanghai 10th People's Hospital
Aphakia, Astigmatism
Post Market Clinical Follow-up (PMCF) Study of Clareon Vivity & Clareon PanOptix
The purpose of this Post-Market Clinical Follow-up study is to describe the long-term safety and performance of the Clareon Vivity and Vivity Toric and Clareon PanOptix and PanOptix Toric IOLs.
- Conditions
- Aphakia, Astigmatism, Presbyopia
- Trial name
- NCT05796453
- Testing
- Clareon Vivity IOL - Non Toric, Clareon Vivity IOL - Toric, Clareon PanOptix Trifocal IOL - Non Toric
- Where
- 7 sites in United States, Puerto Rico
- Volunteers
- 470 people
- Sponsor
- Alcon Research
Myopia
Safety and Effectiveness of Wavefront-Guided LASIK Corrections of Myopic Refractive Errors
The purpose of this clinical trial is to demonstrate that wavefront-guided LASIK is safe and effective for the correction of myopic refractive errors.
- Trial name
- NCT01663363
- Testing
- LASIK correction of myopic refractive errors
- Volunteers
- 170 people, healthy volunteers welcome
- Sponsor
- Abbott Medical Optics
Myopia
Myoslow Lens Study to Control Myopia in Children
A Prospective, randomized, controlled double masked trial to assess the performance of Myoslow lens in slowing myopia progression in children.
- Trial name
- NCT06553404
- Testing
- Myoslow, Single Vision
- Where
- Israel
- Volunteers
- 125 people
- Sponsor
- Crystal Optic
Refractive Error
Initial Performance of a Modified Daily Disposable Contact Lens
The purpose of this study is to evaluate the incidence of ocular discomfort device-related adverse events with DAILIES TOTAL1® with UV Absorber (DT1 UV) contact lenses compared with current DAILIES TOTAL1® (DT1) contact lenses.
- Trial name
- NCT02694835
- Testing
- Delefilcon A contact lenses with UV Absorber, Delefilcon A contact lenses
- Volunteers
- 81 people
- Sponsor
- Alcon Research
Myopia, Refractive Ametropia
Comparison of Two Rotational Alignment Methods for Astigmatism Correction in SMILE Surgery
Small incision lenticule extraction (SMILE) is a commonly used corneal refractive procedure for correcting myopia and myopic astigmatism.
- Trial name
- NCT07696468
- Testing
- Device-assisted cyclotorsion control during SMILE, Manual limbal marking-guided cyclotorsion adjustment during SMILE
- Where
- China
- Volunteers
- 52 people
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Cataract, Presbyopia
Clinical Evaluation of a Small Aperture Extended Depth of Focus Intraocular Lens
The purpose of this study is to determine the safety and effectiveness of the IC-8 IOL implanted in one eye and a monofocal or monofocal toric IOL implanted in the fellow eye in accordance with the indication.
- Trial name
- NCT03633695
- Testing
- IC-8 IOL Group, Control Group
- Where
- 21 sites in United States
- Volunteers
- 453 people, healthy volunteers welcome
- Sponsor
- AcuFocus, Inc.
Myopia
The Effects of Low-dose Atropine and Orthokeratology in Pediatric Myopia Control
Both orthokeratology and atropine eye drops are effective methods for myopia control, but few studies have compared them all together simultaneously.
- Trial name
- AVO (NCT05478356)
- Testing
- low-dose atropine eye drops, orthokeratology
- Where
- 2 sites in China
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Evidence Based Cataract Study Group
Presbyopia, Cataract
The Effect of Cataract Extraction on the Contractility of Ciliary Muscle
The purpose of this study is to investigate the changes in the pilocarpine-induced ciliary body movement before and after cataract extraction in order to determine the effect of lens sclerosis on the ciliary muscle contractility.
- Trial name
- NCT00624039
- Testing
- UBM with pilocarpine in presbyopia
- Where
- South Korea
- Volunteers
- 15 people
- Sponsor
- Samsung Medical Center
Presbyopia
Safety and Effectiveness Study of the AcuFocus Corneal Inlay ACI 7000PDT in Presbyopes
The purpose of this study is to determine if the AcuFocus Corneal Inlay ACI 7000PDT will provide an effective method for the correction of presbyopia in patients who have normal distance vision but need a correction such as…
- Trial name
- ACI (NCT00819299)
- Testing
- AcuFocus Corneal Inlay ACI 7000PDT
- Where
- 15 sites in United States
- Volunteers
- 359 people, healthy volunteers welcome
- Sponsor
- AcuFocus, Inc.
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