Clinical trials: Axial Length
Astigmatism, Myopia
Effect of a Myopia Control Lens on the Astigmatism in Children
The goal of this clinical trial is to investigate over a one-year period the effect of myopia control spectacle lenses on astigmatism in children aged 6 to 13 years with myopia and astigmatism.
- Trial name
- MAC (NCT07810725)
- Testing
- Lenslet-based myopia control spectacle lens
- Volunteers
- 15 people
- Sponsor
- Essilor International
Myopia, Myopia Progression
The A.R.R.E.S.T.® Contact Lens Study
The goal of this clinical trial is to learn if contact lenses using Active Reconfiguration in Retinal Encoding of Spatio-Temporal (A.R.R.E.S.T.®) signal technology works to slow down the rate of myopia progression compared to…
- Trial name
- NCT06878118
- Testing
- Single-vision contact lens, A.R.R.E.S.T.® contact lens
- Where
- 2 sites in China, Malaysia
- Volunteers
- 80 people
- Sponsor
- nthalmic Pty Ltd
Cataract
AI-Driven IOL Prediction Using SS-OCT Biometry
This prospective, multicenter, non-interventional observational study aims to evaluate the agreement between a novel swept-source optical coherence tomography (SS-OCT) biometer and the IOLMaster 700 for ocular biometric…
- Trial name
- NCT07733154
- Testing
- IOLMaster 700, Novel SS-OCT Biometer
- Where
- 3 sites in Australia, China and 1 more
- Volunteers
- 2,500 people
- Sponsor
- The Hong Kong Polytechnic University
Myopia, Progressive
To Evaluate the Efficacy and Safety of an Defocus Lens in Slowing the Progression of Myopia
To confirm the efficacy of DIMS lenses in controlling myopia progression, we planned a prospective, single-centre, randomised, double-blind, controlled, non-inferiority clinical study.
- Trial name
- NCT06405711
- Testing
- frame lens
- Where
- China
- Volunteers
- 138 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
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
Hyperopia, Amblyopia
Effect of Peripheral Defocus on Axial Growth in Hyperopes
Hyperopia, also known as farsightedness, is a common type of refractive error where distant objects may be seen more clearly than objects that are near.
- Conditions
- Hyperopia, Amblyopia, Anisohyperopia
- Trial name
- NCT02686879
- Testing
- Multifocal contact lenses, Single vision contact lenses
- Where
- 2 sites in United Kingdom
- Volunteers
- 39 people, healthy volunteers welcome
- Sponsor
- Aston University
Visual Quality, Axial Length
The Influence of Axial Length on Visual Quality Following SMILE Surgery in Patients with High Myopia
This retrospective study aimed to investigate the subjective and objective visual outcomes following Small Incision Lenticule Extraction (SMILE) surgery in high myopic patients with varying axial lengths (AL).
- Conditions
- Visual Quality, Axial Length, High Myopia
- Trial name
- NCT06898164
- Testing
- This study does not involve any interventions
- Where
- China
- Volunteers
- 113 people, healthy volunteers welcome
- Sponsor
- yuhao shao
Fuchs' Endothelial Dystrophy, Pseudophakic Bullous Keratopathy
The Effect Of Preoperative Parameters On Success After DMEK Surgery
The aim of this study is to evaluate the effect of preoperative parameters on surgical results in Descemet Membrane Endothelial Keratoplasty (DMEK) surgery.
- Conditions
- Fuchs' Endothelial Dystrophy, Pseudophakic Bullous Keratopathy, Descemet's Membrane; Defect, Herpetic Keratitis
- Trial name
- NCT04420429
- Testing
- Descemet membrane endothelial keratoplasty (DMEK)
- Where
- Turkey (Türkiye)
- Volunteers
- 43 people
- Sponsor
- Beyoglu Eye Research and Education Hospital
Longitudinal Chromatic Aberration, Blue Light Defocus Manipulation
Application and Clinical Evaluation of Longitudinal Chromatic Aberration Technique in Ophthalmology
Our study aims to delve into the effects of shifting the focal point of blue light from video or text displayed on a terminal screen forward on the axial length of the eye, ocular blood flow, visual fatigue, and visual function…
- Trial name
- NCT06449976
- Testing
- blue light defocus and blue light filtering
- Where
- China
- Volunteers
- 21 people, healthy volunteers welcome
- Sponsor
- Beijing Tongren Hospital
Myopia
The Efficacy and Safety of Periocular Acupoint Stimulation on Myopia Progression in Children
Myopia is widely one of the three commonly detected refractive errors. Myopia is usually managed by correction through glasses or contact lenses. Other alternative available include surgery, drugs and acupuncture.
- Trial name
- NCT02064660
- Testing
- massager
- Where
- South Korea
- Volunteers
- 20 people
- Sponsor
- Korean Medicine Hospital of Pusan National University
Myopia
Axial Length With Adult Onset Myopia (ALWAOM)
Purpose: To determine axial length progression and its relationship with myopia onset and progression in adults.
- Trial name
- ALWAOM (NCT05559567)
- Testing
- Orthokeratology
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Art Optical Contact Lens, Inc.
Soft Contact Lens
Soft Peripheral Contact Lens for Eye Elongation Control (SPACE):1-year Results of a Double-blinded Randomized Con-trolled Trial
A prospective, randomised, double-blinded clinical trial was conducted including 115 children (55 male and 60 female) aged 8 to 15 years.
- Trial name
- NCT05733884
- Testing
- soft contact lens
- Where
- Taiwan
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Chung Shan Medical University
Refractive Errors
Measurment of Optic Disc Parameters, RNFL Thickness and Ganglion Cell Complex in Myopic, Hypermetropic and Emmetropic Patients Using OCT and Axial Length Measurments
To evaluate the optic disc parameters, thickness of ganglion cell complex (GCC), and thickness of peripapillary retinal nerve fiber layer (RNFL) in myopic and hyperopic and emmetrop patients using optical coherence tomography…
- Trial name
- NCT07241806
- Testing
- OCT
- Volunteers
- 266 people, healthy volunteers welcome
- Sponsor
- Assiut University
Myopia
Wearing Behavior and Eye Length Changes in Children With Myopia Wearing Myopia Control Spectacle Lenses
The goal of this clinical trial is to learn how children with myopia aged 8 to 15 years move their eyes and heads during near-vision tasks while wearing different spectacle lenses, and if wearing myopia control spectacle lenses…
- Trial name
- NCT07780851
- Testing
- Single Vision Lens (SVL), Myopia Control Lens (MCL)
- Where
- Singapore
- Volunteers
- 20 people
- Sponsor
- Essilor International
Cataract Senile, Myopia, High-Grade
Evaluation of Axial Stability of Two Models of Intraocular Lenses in Patients With an Eye Length More Than 26 mm
Some parameters, such as a change in the optic tilt and axial decentration, can affect the optical characteristics of intraocular lenses (IOLs) in postoperative period, which leads to residual refractive errors and other…
- Conditions
- Cataract Senile, Myopia, High-Grade, Corneal Astigmatism
- Trial name
- NCT05129566
- Testing
- IOL Clareon AutonoMe, IOL Hoya iSert 251
- Where
- Russia
- Volunteers
- 78 people
- Sponsor
- The S.N. Fyodorov Eye Microsurgery State Institution
Myopia, Orthokeratology
The Effect of Treatment Zone Decentration on Axial Length Elongation After Orthokeratology
Orthokeratology lens is an effective method for myopia control. This study analyzed the effects of treatment zone decentration on axial length elongation in adolescents with orthokeratology lens.
- Trial name
- NCT05365373
- Where
- China
- Volunteers
- 251 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Myopia
Myopia Control in Children: Comparison of Defocus Incorporated Multiple Segments® Lenses Versus Atropine 0.05% Eyedrops
Myopia is the most common refractive disorder in the world. Many strategies have been developed to control myopia in children. Among them, the instillation of low-concentration atropine eyedrops has been proven to be effective in…
- Trial name
- ATROSMART (NCT05062031)
- Testing
- Defocus Incorporated Multiple Segments® (DIMS®) lenses, Atropine 0.05% eyedrops, Monofocal lenses
- Where
- France
- Volunteers
- 116 people
- Sponsor
- Fondation Ophtalmologique Adolphe de Rothschild
Pseudophakia, Refractive Error
IOL Power Formula Prediction Accuracy at the Extremes of Axial Length: A Prospective Outcome Verification Study
This single-center, prospective, cross-sectional study evaluates how accurately eight modern intraocular lens (IOL) power calculation formulas predicted the postoperative refractive result in eyes with extreme axial length after…
- Trial name
- FORMULEX-OV (NCT07724795)
- Testing
- Standardized postoperative outcome visit
- Where
- Austria
- Volunteers
- 200 people
- Sponsor
- Vienna Hospital Association
Myopia
Effect of Axial Length of the Globe on Retinal Nerve Fibre Thickness
the goal of this obsrevational study is to learn about retinal nerve fibres and if their numbers changed with axial length of the globe or not.
- Trial name
- NCT05716776
- Testing
- Optical coherence tomography (OCT)
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Sohag University
Myopia, Progressive
DIMS-myopia Progression ADN Axial Length Growth
To confirm the efficacy of DIMS lenses in controlling myopia progression, we planned a prospective randomized controlled clinical study.
- Trial name
- NCT05300321
- Testing
- frame lens
- Where
- China
- Volunteers
- 82 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital