Clinical trials: Ocular Refraction
Eye Diseases, Ametropia
Comparison of Subjective Refraction Measurement With SiVIEW Software and by an Expert
Main objective Show that the equivalent sphere refraction measurements obtained by the SiVIEW software have no significant clinical difference with those obtained by an optometrist expert.
- Trial name
- NCT04185701
- Testing
- SiVIEW software, Expert
- Where
- France
- Volunteers
- 111 people
- Sponsor
- SiVIEW
Anisometropia, Myopia
Targeted Lens Intervention for Myopic Anisometropia in Children
The goal of this clinical trial is to learn if our research spectacles will lower the difference in prescription (spectacles degree) between the eyes in children between 6 to 13 years old with anisometropic myopia.
- Trial name
- NCT07533149
- Testing
- More myopic eye: MCL1; Less myopic eye: MCL2
- Where
- Singapore
- Volunteers
- 20 people
- Sponsor
- Essilor International
Cataract Senile
Eyhance Autorefraction Study
Since 2018, the Tecnis Eyhance ICB00 lens (Johnson\&Johnson Vision, AMO Germany GmbH) was introduced, which is a monofocal IOL which has the ability of extended depth of focus improving intermediate vision without the photic…
- Trial name
- NCT04572334
- Testing
- Auto and Subjective Refraction
- Where
- Austria
- Volunteers
- 100 people
- Sponsor
- Vienna Institute for Research in Ocular Surgery
Myopia, High, With Cataract and Anterior Capsule Polished
The Influences Of Anterior Capsule Polishing On Anterior Capsular Changes and Intraocular Lenses Stability of Super High Myopic Eyes
A prospective study included 20 patients with super high myopia who underwent bilateral uneventful cataract. 360°anterior capsule polishing was performed with double-ended capsule polisher randomly in one eye, and the opposite…
- Trial name
- NCT03142269
- Testing
- 360°anterior capsule polishing
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- yin ying zhao
Refractive Errors
Study to Evaluate the Reliability, Validity and Safety of Subjective Mobile Refraction
This study evaluates the reliability, validity and safety of a self administered, subjective refraction test via a mobile medical app (GoEyes) as compared to standard of care subjective manifest refraction performed by a health…
- Trial name
- NCT05049070
- Testing
- Mobile medical application to self administer a subjective refraction test, Standard of care refraction test
- Where
- 12 sites in United States
- Volunteers
- 349 people
- Sponsor
- 1800 Contacts, Inc.
Refractive Errors
Measurement of Refractive SE Following Implantation of LS313 MF30 IOL
This Study determines the most precise method for measuring post-operative refraction following implantation of the asymmetric multifocal LS-313 MF30 comparing the results of Refraction of the different Autorefractor Keratometers…
- Trial name
- NCT03292614
- Testing
- Measurements of the postoperative refraction
- Where
- Germany
- Volunteers
- 25 people
- Sponsor
- Dietrich-Bonhoeffer-Klinikum
Pseudophakia, Hypermetropia
Treatment of Residual Hypermetropic Refraction on Pseudophakic Patients Using Allogenic Fresh Myopic Lenticule
The residual hypermetropic refraction on pseudophakic(Trifocal IOL) patients is difficult to treat surgically. In addition, there are not many suitable options to offer such patients presenting with this condition.
- Conditions
- Pseudophakia, Hypermetropia, Myopia
- Trial name
- ReLex-Smile (NCT04692012)
- Testing
- FRESH CORNEAL MYOPIC LENTICULE IMPLANTATION
- Where
- Kosovo
- Volunteers
- 34 people
- Sponsor
- Eye Hospital Pristina Kosovo
Cycloplegic Paralysis of Accommodation
Assessing Patient Comfort, Anxiety, and Satisfaction During CR Comparing Conventional Drops With ROC
This study aims to compare the efficacy of conventional cycloplegic agents, such as cyclopentolate, with rapid-onset cycloplegics, like a combination of tropicamide and phenylephrine, in reducing patient anxiety and discomfort…
- Trial name
- NCT06914063
- Testing
- Rapid-Onset Cycloplegic Drops, Conventional Cycloplegic Drops
- Where
- Pakistan
- Volunteers
- 74 people
- Sponsor
- Superior University
Refractive Errors
Evaluation of the Agreement Between Automated Program-Operated Phoropter Subjective Refraction and Optometrist-Performed Subjective Refraction
This study aims to evaluate the performance of an automated subjective refraction system that operates a digital phoropter. By comparing its results with those obtained through conventional subjective refraction performed by an…
- Trial name
- NCT07891897
- Testing
- Automated Program-Controlled Subjective Refraction, Optometrist-Performed Subjective Refraction
- Volunteers
- 508 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Myopia
Baseline Relative Peripheral Refraction in Myopia Control
Myopia has become a world concern and its prevalence has increased in recent decades. Myopic defocus has been applied for slowing down the axial elongation and myopia progression, which is mainly based on the theory of…
- Trial name
- NCT06161311
- Testing
- DIMS lenses
- Where
- Hong Kong
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- The Hong Kong Polytechnic University
Precocious Puberty, Early Puberty
Effect of Exogenous Growth Hormone on Ocular Findings
Body size and eye function play an essential role in adapting to the environment and human survival. Growth hormone is commonly recognized by its effect on the height of individuals; Although from an evolutionary perspective, the…
- Conditions
- Precocious Puberty, Early Puberty, Refraction Error
- Trial name
- NCT05338411
- Where
- 2 sites in Iran
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Isfahan University of Medical Sciences
Refractive Surgery
Topography Guided LASIK by Different Protocols for Treatment of Astigmatism
Background and Rationale: LASIK has been among the highest satisfaction rates of surgical procedures, ranging from 82%-98%. Different ablation profiles have been developed over the years.
- Trial name
- NCT03597906
- Testing
- topography guided ablation, manifest refraction, full topography modified refraction
- Where
- Egypt
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Cairo University
Refractive Errors
Clinical Validation Study Protocol for SmartEyes Smart Optometry Measurement Device (Medical Device Clinical Validation Study)
This study aims to evaluate the SmartEyes smart refraction measurement device in two phases under real outpatient optometry room visits at Wuhan Children's Hospital.
- Trial name
- CVSP-SOMD (NCT07803094)
- Testing
- SmartEyes smart refraction measuring device, Topcon KR800, Subjective refraction
- Volunteers
- 200 people
- Sponsor
- The Hong Kong Polytechnic University
Vision Loss Night
Comparison of Different Refraction Measurements in Adults
The combatant is likely to carry out missions any time, any place, day or night. The very strong degradation of natural vision performance in these conditions justifies the use of visual replacement means, based on optronic…
- Trial name
- REFRACT (NCT04434521)
- Testing
- Questionnaire, Eye examination
- Where
- France
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- Direction Centrale du Service de Santé des Armées
Cataract Extraction
Microincision Versus Smallincision Combined Surgery
The purpose of this study is to compare refractive outcomes after two different types of combined cataract surgery, namely microinscision cataract surgery and smallincision cataract surgery, and sutureless 23-gauge vitrectomy in…
- Trial name
- NCT01198483
- Testing
- Combined Micro- Surgery, Combined Small-Surgery
- Where
- Austria
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- The Ludwig Boltzmann Institute of Retinology and Biomicroscopic Laser Surgery
Myopia
Study of Viziatek ISL™ Refractive Phakic Intra Sulcus Lens for Refraction Adjustment in Blind Volunteers
This is a clinical investigation. A total of up to 5 subjects, but not less than 3 at one investigational site will undergo insertion of the ISL in one eye and will be followed through 6 months postoperative.
- Trial name
- NCT05518344
- Testing
- Viziatek ISL™ (hereinafter referred to as the "ISL") implanted in blind eye.
- Where
- Latvia
- Volunteers
- 4 people
- Sponsor
- Hanita Lenses
Ocular Refraction
Pediatric Refraction With SVOne Autorefractor
The study is used to verify the accuracy and repeatability of Smart Vision Labs Refractor in a pediatric population (between 5 and 16 years of age).
- Trial name
- NCT02559271
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Smart Vision Labs
Ametropia, Refractive Error
Post Marketing Clinical Study on the Efficacy of Lenses From a New Prescription Protocol
The goal of this clinical trial is to assess improvements in visual performance and patient outcomes in wearing new spectacle lenses in general population. The two spectacle lenses will be compared after two weeks of wearing.
- Trial name
- ATLANTIC (NCT07168564)
- Testing
- AVA lenses, Standard lenses
- Where
- United States
- Volunteers
- 120 people
- Sponsor
- Essilor International
Mantle Cell Lymphoma
Lenalidomide Observational Study in Patients With Mantle Lymphoma in Relapse/Refraction. Spanish Programme RRMCL Results.
This is a multicentric, observational and retrospective study of the use of lenalidomide in patients with relapsed or refractory mantle cell lymphoma that are included in the RRMCL spanish program.
- Trial name
- NCT04109872
- Testing
- Lenalidomide
- Where
- Spain
- Volunteers
- 25 people
- Sponsor
- Fundación Pública Andaluza para la gestión de la Investigación en Sevilla
Myopia, Myopia; Refractive Error
Peripheral Relative Refractive Power of Orthokeratology Lenses
Orthokeratology (OK) has been demonstrated to be an effective intervention for slowing axial elongation in children with myopia.
- Trial name
- NCT07294404
- Testing
- orthokeratology
- Where
- China
- Volunteers
- 53 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital