Clinical trials: Refractive Assessment
Refractive Errors
Study to Evaluate the Safety and Efficacy of HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens
Study to evaluate the safety and efficacy of HI-BRITE large diameter rigid gas permeable contact lens (hexafocon b) test when worn on a daily wear basis in the correction of myopia/hyperopia/astigmatism/presbyopia/ and irregular…
- Trial name
- NCT02812316
- Testing
- HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens
- Where
- Taiwan
- Volunteers
- 136 people, healthy volunteers welcome
- Sponsor
- Taipei Medical University Hospital
Myopia, Myopia; Astigmatism
Assessment of IOP After Corneal Refractive Surgery Based on AI
Significance, Background, and Current Status Studies show the global average prevalence of myopia is 22%, with hyperopia incidence being similar.
- Conditions
- Myopia, Myopia; Astigmatism, Refractive Surgery, Intraocular Pressure Changes
- Trial name
- AIOP-CRS-AI (NCT07544615)
- Where
- China
- Volunteers
- 10,030 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Refractive Error - Myopia Bilateral
Study to Evaluate the Clinical Performance of Deseyne (Vifilcon C) Daily Disposable Soft Contact Lens
This clinical study is to provide clinical performance data comparing the test lens (Deseyne [vifilcon C] daily disposable soft contact lens) to a control lens (1-Day Acuvue Moist [etafilcon A] daily disposable soft contact lens)…
- Trial name
- NCT05927753
- Testing
- Deseyne Daily Disposable Contact Lens (Test Device)
- Where
- 3 sites in United States
- Volunteers
- 81 people, healthy volunteers welcome
- Sponsor
- Bruno Vision Care
Myopia, Anisometropia
Ocular Response Analyzer Assessment of Intraocular Pressure and Corneal Biomechanical Properties in Myopic and Anisometropic Patients Under Atropine Treatment
Our study has three parts has three parts, and the main aim of the study is to find out if corneal hysteresis was associated with myopia or even a predictor of myopia poor control predictor: Part 1 of our study: patients with…
- Trial name
- NCT00658502
- Where
- Taiwan
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Far Eastern Memorial Hospital
Astigmatism
Clinical Evaluation of Two Toric Contact Lenses in Current Non-toric Lens Users
The purpose of this study is to evaluate the clinical performance, defined as successful fit, of two toric contact lenses (one daily disposable and the other daily wear reusable contact lens to correct astigmatism) in current…
- Trial name
- NCT01180998
- Testing
- Senofilcon A Toric (AOfA), Etafilcon A Toric (1DAMfA)
- Where
- 18 sites in United Kingdom
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Refractive Surgery, Refractive Error - Myopia
Evaluate the Safety and Effectiveness of the AccuraSee™ IOPCL for Secondary Implantation in the Capsular Bag to Improve Near and/or Intermediate Vision Following Previous Cataract Surgery
This is a study to evaluate the safety and effectiveness of the AccuraSee™ intraocular pseudophakic capsular lens (IOPCL) to improve near and/or intermediate vision following previous cataract surgery.
- Trial name
- NCT06625749
- Testing
- Accurasee™ IOPCL
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- OnPoint Vision Inc
Myopia, Hyperopia
Clinical Evaluation of Two Frequent Replacement Soft Spherical Contact Lenses
This was a single-blind (participant masked), interventional, prospective, direct refit, bilateral wear short-term fitting study.
- Trial name
- NCT05656885
- Testing
- Lens A, Lens B
- Where
- Spain
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Normal Cornea, Post Laser Refractive Surgery
Evaluation of RTVue in Corneal Measurement
The purpose of this study is to evaluate RTVue measurement of the cornea in various ocular conditions to include normal, pathology, post refractive surgery and cataract.
- Conditions
- Normal Cornea, Post Laser Refractive Surgery, Cornea Pathology, Cataract Surgery
- Trial name
- NCT01220193
- Where
- 2 sites in United States
- Volunteers
- 196 people, healthy volunteers welcome
- Sponsor
- Optovue
Myopia
To Evaluate The Performance Of Two Monthly Replacement Silicone Hydrogel Contact Lenses After 1-month Of Wear
To evaluate the performance of two monthly replacement silicone hydrogel contact lenses in habitual FRP CL wearers when worn for 1-month.
- Trial name
- NCT05333965
- Testing
- Lens A (lehfilcon A lens), Lens B (comfilcon A lens)
- Where
- Canada
- Volunteers
- 26 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Presbyopia
Clinical Assessment of a Customized Free-form Progressive Addition Lens Spectacle
The purpose of this study was to compare objective clinical measures of visual performance and subjective measures of satisfaction and preference between standard progressive addition lens (PAL) spectacles and a new type of…
- Trial name
- CZV_PAL1 (NCT01234207)
- Testing
- Standard, non-free-form, non-customized PAL spectacles, Individually customized free-form surfaced PAL spectacles
- Where
- United States
- Volunteers
- 95 people, healthy volunteers welcome
- Sponsor
- University of California, Berkeley
Myopia
An Evaluation Of The Fitting Success Rate Of Senofilcon A Soft Contact Lenses In Three Designs.
This study will compare the on-eye fitting characteristics of three types of contact lenses. Each lens pair will be worn for 30 to 45 minutes before assessment and the results will be compared to mathematically calculated fitting…
- Trial name
- NCT03384628
- Testing
- First pair Senofilcon A contact lens, Second pair Senofilcon A contact lens, Third pair Senofilcon A contact lens
- Where
- 2 sites in United Kingdom
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- Graeme Young
Visual Acuity, Astigmatism
LFR-260 vs Traditional Phoropter in Visual Acuity Testing
The purpose of this study is to establish if LFR-260 (investigational device) is not inferior in effectiveness to a traditional phoropter (control device) when applied in visual acuity test in subjects undergoing a full routine…
- Conditions
- Visual Acuity, Astigmatism, Anisometropia
- Trial name
- NCT05259163
- Testing
- LFR-260 portable phoropter, Traditional phoropter (SOC)
- Where
- 2 sites in United States
- Volunteers
- 112 people, healthy volunteers welcome
- Sponsor
- Evolution Optiks Limited
Myopia, Strabismus
Evaluation of a County-Based Eye Health Service Model in Rural Chinese Children
This project proposes to conduct a prospective, multicenter registry study in rural China to evaluate, under real-world conditions, the implementation effectiveness of an integrated child eye health service model centered at the…
- Conditions
- Myopia, Strabismus, Eye Health
- Trial name
- NCT07547748
- Testing
- School-based Eye Health Screening
- Where
- China
- Volunteers
- 20,000 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Presbyopia
Safety & Efficacy of the Laser Scleral Microporation Procedure
A new minimally invasive procedure for treating presbyopia is being evaluated to determine if there is improvement in near and intermediate vision after treatment
- Trial name
- NCT05068479
- Testing
- Bilateral Laser Scleral Microporation procedure
- Where
- Panama
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- ACE Vision Group, Inc.
Myopia
Assessment of Bifocal and Prismatic Bifocal Spectacles for Myopia Control in Children
1. To determine if the effect of near-addition lenses (bifocals) is more prominent for children with high myopia progression. 2.
- Trial name
- NCT00787579
- Testing
- Bifocal spectacles, Prismatic bifocal spectacles
- Where
- Canada
- Volunteers
- 135 people, healthy volunteers welcome
- Sponsor
- Essilor International
Presbyopia
Safety and Effectiveness of the AcuFocus Corneal Inlay ACI7000PDT in Presbyopes
The purpose of this study is to determine if the AcuFocus Corneal Inlay ACI 7000PDT will provide an effective method of for the correction of presbyopia in patients who have normal distance vision but need correction such as…
- Trial name
- NCT01352442
- Testing
- AcuFocus Corneal Inlay ACI 7000PDT
- Where
- 11 sites in Australia, Austria and 8 more
- Volunteers
- 151 people, healthy volunteers welcome
- Sponsor
- AcuFocus, Inc.
Presbyopia, Refractive Errors
Safety and Efficacy of a Sub-epitheilal Transform™ Corneal Allograft (TCA) for Presbyopia Correction
The objective of this clinical study is to evaluate the safety and effectiveness of subepithelial implantation of the Allotex TransForm corneal allograft (TCA) for improving near vision in presbyopic subjects.
- Trial name
- NCT03675438
- Testing
- Sub-epitheilal TCA Inlay
- Where
- 11 sites in Austria, Belgium and 4 more
- Volunteers
- healthy volunteers welcome
- Sponsor
- Allotex, Inc.
Cataract, Presbyopia
Comparison of Two Different Optical Biometric Systems
Primary objective of this study is to evaluate and compare the measurements of two different optical biometrics systems in patients who will undergo cataract surgery or presbyopia surgery using intraocular lenses (IOL-PC).
- Conditions
- Cataract, Presbyopia, Ocular Biometry, Intraocular Lens
- Trial name
- NCT05411341
- Testing
- Argos (Alcon Laboratories, Inc.), IOLMaster 500 (Carl Zeiss Meditec AG)
- Where
- Greece
- Volunteers
- 133 people, healthy volunteers welcome
- Sponsor
- Democritus University of Thrace
Nearsightedness, Farsightedness
An Evaluation of LASIK, SMILE and PRK Surgery in Physicians
The principle investigator is evaluating self-reported quality of vision and quality of life in physicians undergoing LASIK, SMILE and PRK surgery.
- Conditions
- Nearsightedness, Farsightedness, Astigmatism
- Trial name
- NCT02576483
- Testing
- Questionnaire (QoV questionnaire)
- Where
- United States
- Volunteers
- 700 people, healthy volunteers welcome
- Sponsor
- Stanford University
Myopia
Efficacy and Influencing Factors of Repeated Low-level Red-light in Myopia
To evaluate the long-term efficacy of repeated low-level red-light (RLRL) therapy in the prevention and control of myopia in children, and to analyze the key factors influencing its efficacy (such as individual differences and…
- Trial name
- RLRL (NCT07104513)
- Testing
- Red Light
- Where
- 2 sites in China
- Volunteers
- 3,000 people, healthy volunteers welcome
- Sponsor
- Ruihua Wei