Clinical trials: Eye--Refractive Errors
Aphakia, Presbyopia
Contralateral Claims Study of Clareon Vivity Pro
The purpose of this study is to test new versions of Clareon Vivity Pro intraocular lenses (IOLs) by comparing them to currently marketed IOLs.
- Trial name
- NCT07484191
- Testing
- Clareon Vivity Pro IOL, Clareon Vivity IOL, TECNIS PureSee IOL
- Where
- 7 sites in Australia
- Volunteers
- 165 people
- Sponsor
- Alcon Research
Corneal Ectasia, Corneal Disease
Dresden Corneal Disease and Treatment Study
The purpose of this study is long-term follow up of patients with corneal diseases to analyze the quality of surgical interventions and diagnosis.
- Conditions
- Corneal Ectasia, Corneal Disease, Corneal Astigmatism, Keratoconus
- Trial name
- NCT04251143
- Testing
- corneal cross-linking, corneal topography and tomography
- Where
- Germany
- Volunteers
- 700 people
- Sponsor
- Technische Universität Dresden
Myopia
Patient Reported Outcomes With WaveLight Plus LASIK
This study is a single-site, single-arm, prospective, observational study of subject satisfaction, quality of vision, and quality of life after bilateral LASIK surgery. Subjects will be assessed 6 months post-operatively.
- Trial name
- NCT07087665
- Testing
- Wavelight Plus
- Where
- United States
- Volunteers
- 60 people
- Sponsor
- OVO LASIK + Lens
Myopia
Myopia Control Efficacy of Second-generation DIMS Spectacle Lenses on Fast Progressing Myopes
The purpose of this study is to examine the efficacy and performance of the variant of Defocus Incorporated Spectacle lenses on controlling myopia progression in fast progressing myopic children.
- Trial name
- NCT05888792
- Testing
- Variant of Defocus Incorporated Spectacle lens (DG2)
- Where
- Hong Kong
- Volunteers
- 118 people, healthy volunteers welcome
- Sponsor
- The Hong Kong Polytechnic University
Refractive Errors, Cataract
Refractive Outcomes After Cataract Surgery in Eyes With Pseudoexfoliation Syndrome
To evaluate the refractive outcomes of cataract surgery in PEX syndrome and determine which of the commonly used IOL formulas (SRK/T, Barrett Universal II and Hill-RBF) is the best in predicting postoperative refractive outcomes…
- Trial name
- NCT04783909
- Testing
- Phacoemulsification cataract surgery
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Medical University of Lublin
Myopia
Progressive Myopia Treatment Evaluation for NaturalVue Multifocal Contact Lens Trial
This is a multi-center, randomized, double-masked clinical trial. All study devices are market approved/cleared in the localities where the study is conducted.
- Trial name
- PROTECT (NCT05159765)
- Testing
- Single vision contact lenses, Multifocal contact lenses
- Where
- 8 sites in United States, Canada and 2 more
- Volunteers
- 144 people, healthy volunteers welcome
- Sponsor
- Visioneering Technologies, Inc
Anisometropia, Hyperopia
Effect of Light-Blocking Lenses on Hyperopic Anisometropic Children
To evaluate the effectiveness of light-blocking lenses in promoting emmetropization and reducing anisometropia in children with hyperopic anisometropia, and to assess the impact of light-intercepting lenses on visual function in…
- Trial name
- NCT07142928
- Testing
- light-blocking lenses, single-vision lenses
- Where
- China
- Volunteers
- 90 people
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Cataract, Myopia
VCSEL Based Optical Swept Source Biometry
Optical interferometric biometry is a non-invasive and highly precise method for measuring eye length and intraocular distances. The method already exists as commercial devices (e.g. IOLMaster, Carl Zeiss Meditec AG).
- Trial name
- VBOB (NCT06551480)
- Testing
- Biometry
- Where
- Austria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Rainer Leitgeb
Refractive Error
DAILIES TOTAL1® Lubricity Post Wear
The primary objective of the study is to demonstrate that the lubricity of DAILIES TOTAL1® (DT1) lenses after 16 hours of wear is equivalent to the lubricity of unworn DT1 lenses.
- Trial name
- NCT02072980
- Testing
- Delefilcon A contact lenses
- Volunteers
- 15 people
- Sponsor
- Alcon Research
Presbyopia
A Continuation Study To Monitor The Long Term Safety Of Patients Completing Protocols ACU-P08-020/020A
This is a 2 year follow up study to monitor the long term safety of the ACI 7000PDT in subjects who are still implanted with the ACI and have successfully completed the ACU-P08-020/020A studies.
- Trial name
- NCT01895088
- Testing
- AcuFocus Corneal Inlay ACI 7000 PDT
- Where
- 13 sites in United States
- Volunteers
- 271 people, healthy volunteers welcome
- Sponsor
- AcuFocus, Inc.
Accomodation, Refractive Errors
Study on the Effect of Two Ways of Cycloplegia on Biological Parameters of Ciliary Muscle
Atropine has a ciliary muscle-paralysing effect and causes hyperopic drift. Besides, atropine has been proven to slow the progression of myopia. Many studies have suggested that atropine can increase the thickness of the choroid.
- Conditions
- Accomodation, Refractive Errors, Myopia, Cycloplegia
- Trial name
- NCT05449015
- Testing
- 1% atropine
- Where
- China
- Volunteers
- 144 people
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Refractive Error
First-Sight Refractive Error Correction: Direct Comparison to Autorefraction Results in Children 7 to 18 Years of Age
Proof of concept study to compare the best corrected visual acuity obtained via First-Sight lenses with the autorefraction in children.
- Trial name
- NCT01365884
- Where
- United States
- Volunteers
- 2 people, healthy volunteers welcome
- Sponsor
- University of Nebraska
Presbyopia
Safety and Efficacy of AGN-199201 and AGN-190584 in Patients With Presbyopia
A study to evaluate the safety and efficacy of AGN-199201 alone, AGN-190584 alone and concurrent use of AGN-199201 and AGN-190584 in patients with presbyopia (inability to focus for near vision).
- Trial name
- NCT02197806
- Testing
- AGN-199201, AGN-190584, AGN-199201 Vehicle
- Where
- United States
- Volunteers
- 65 people
- Sponsor
- Allergan
Myopia, Progressive
Near Horizontal Heterophoria in Chinese Children
This study aimed to assess the association of refraction and axial length with near-horizontal heterophoria in a large population-based study of school-aged Chinese children.
- Trial name
- NCT05007626
- Testing
- axial length and refractive error
- Where
- China
- Volunteers
- 15,081 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Myopia
The Effects of Low Concentration Atropine on Pupil Size and Accommodation
The purpose of this study is to determine whether less frequent dosing of atropine drops may be as effective as daily dosing for the treatment of progressive myopia.
- Trial name
- NCT02870478
- Testing
- Atropine
- Where
- United States
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- University of California, Berkeley
Cataract, Astigmatism
A Comparison of Corneal Aberrations in Subjects With Contralateral AcrySof IQ Toric Intraocular Lens (IOL) and AcrySof IQ IOL With Limbal Relaxing Incision (LRI)
The purpose of this study was to evaluate and compare postoperative corneal aberrations and visual parameters in patients contralaterally implanted with an AcrySof IQ Toric intraocular lens (IOL) and AcrySof IQ Aspheric IOL with…
- Trial name
- NCT01045733
- Testing
- AcrySof IQ Toric IOL, AcrySof IQ Aspheric IOL, Limbal Relaxing Incision (LRI)
- Where
- United States
- Volunteers
- 70 people
- Sponsor
- Alcon Research
Presbyopia
Functional Assessment of ADL in Patients Who Underwent Bifocal and Trifocal Presbyopic Correction
Patients who underwent bilateral bifocal or trifocal lenses implantation for presbyopia correction with monofocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily…
- Trial name
- NCT03021512
- Testing
- Phaco with Restor, Phaco with Panoptix
- Where
- Greece
- Volunteers
- 80 people
- Sponsor
- Democritus University of Thrace
Myopia
Effect of Preoperative Pupil Size on Quality of Vision After Wavefront-Guided LASIK
The purpose of this study is to evaluate whether the size of the pupil has an effect on quality of vision in patients undergoing LASIK surgery.
- Trial name
- NCT00889941
- Testing
- LASIK
- Where
- United States
- Volunteers
- 51 people
- Sponsor
- Stanford University
Myopia, Child Myopia Progression
Photolithography Microstructure Myopia Management Lenses in Preventing and Controlling Myopia in Children and Adolescents
Evaluate the effectiveness of different lithographic microstructured myopia management lenses in controlling the progression of myopia in children and adolescents, as well as the safety and comfort of wearing them.
- Trial name
- NCT07514039
- Testing
- Myopia management lens
- Where
- China
- Volunteers
- 252 people, healthy volunteers welcome
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Myopia
The Effect of Silicone Hydrogel Contact Lenses on Conjunctival Flora
The primary purpose of this study is to investigate the effect of silicone hydrogel contact lenses on conjunctival flora over a period of 6 months of daily wear.
- Trial name
- NCT00531375
- Testing
- Silicone hydrogel contact lens
- Where
- Australia
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of Melbourne
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