Clinical trials: Axial Length
Hyperopia, Refractive Error
Optical Defocus to Stimulate Eye Elongation in Hyperopia
Axial hyperopia results when the length of the eye is too short for the eye to properly focus distance objects on the retina while the focusing system is relaxed.
- Trial name
- ODSEEH (NCT00950924)
- Testing
- Simultaneous Vision Bifocal Soft Contact Lenses, Single Vision Soft Contact Lenses
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Aller, Thomas A., OD
Myopia
Comparison of Efficacy Between Two Myopia Control Lenses
This is a one-year, mono-centre, randomize, double-masked, monocular cross-over clinical trial designed to test and compare the efficacy of the new lens design in slowing down the increase of axial length and controlling myopia…
- Trial name
- NCT06148870
- Testing
- Myopia Control Lens-1 (MCL1), Myopia Control Lens-2 (MCL2)
- Where
- Singapore
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Essilor International
Phacoemulsification
Clinical Analysis of Ocular Parameters Contributing to Intraoperative Pain During Standard Phacoemulsification
Charts of 142 patients who underwent standard phacoemulsification under topical anesthesia between March and August 2016 were reviewed.
- Trial name
- NCT03031652
- Testing
- Phacoemulsification
- Where
- South Korea
- Volunteers
- 142 people, healthy volunteers welcome
- Sponsor
- Kyungpook National University Hospital
Myopia
The Beijing Childhood Eye Study
Axial myopia has emerged as the leading cause of irreversible vision loss in East Asia, driven by its progression to sight-threatening complications including myopic macular degeneration, retinal detachment, open-angle glaucoma…
- Trial name
- BCES (NCT06931444)
- Where
- China
- Volunteers
- 3,760 people, healthy volunteers welcome
- Sponsor
- Beijing Tongren Hospital
High Myopia, Axial Length
Repeated Low-Level Red-Light Therapy Shortens Axial Length
The purpose of this clinical trial is to investigate the incidence and magnitude of axial length shortening after repeated low-level red-light therapy in high myopia children and teenagers.
- Conditions
- High Myopia, Axial Length, Eye Diseases
- Trial name
- NCT05768152
- Testing
- RLRL
- Where
- China
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- The Second People's Hospital of Foshan
Myopia, Progressive
Myopia Preventing With Distance-image Screen
This study is for testing the efficacy and safety of distance-image screens for preventing myopia in children for 12 month. Each subjects would be asked to paired test the ocular parameters between before and after 12-month…
- Trial name
- DIS (NCT06088225)
- Testing
- distance-image screen
- Where
- China
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Beijing Airdoc Technology Co., Ltd.
Refractive Errors, Hyperopia
School-based Myopia Prevention Trial for Children With Insufficient Hyperopic Reserve
This is a prospective, school-based randomized controlled trial designed to evaluate auricular acupressure for myopia prevention in non-myopic primary school students with insufficient hyperopic reserve.
- Conditions
- Refractive Errors, Hyperopia, Myopia
- Trial name
- SPARK (NCT07746804)
- Testing
- Auricular Acupressure, Eye Health Education
- Where
- China
- Volunteers
- 130 people, healthy volunteers welcome
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Axial Length, Myopia
China Children Eye Study
The primary objective of this multi-center, observational study is to establish the reference ranges of axial length in Chinese children and adolescents.
- Conditions
- Axial Length, Myopia, Child Development
- Trial name
- CCES (NCT05770661)
- Where
- 2 sites in China
- Volunteers
- 30,000 people, healthy volunteers welcome
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Healthy
Study of the Choroidal and Retinal Thickness in Relation to Axial Length.
The aim of the study is the non-invasive morphological evaluation of the choroid and the retina in relation to the length of the eyeball in healthy, young man and women.
- Trial name
- CHORAL (NCT03377075)
- Testing
- AL measurement, OCT
- Where
- Hungary
- Volunteers
- 55 people, healthy volunteers welcome
- Sponsor
- Semmelweis University
Axial Length, Myopia
Study of the Intervention Effect of Outdoor Activity Period Patterns in Promoting Myopia Among Preschool Children
This study is a randomized controlled trial based on outdoor activity interventions at specific time periods, involving preschool children aged 4 to 5 years.
- Trial name
- NCT06607640
- Testing
- Increase outdoor activity time during specific time periods
- Volunteers
- 210 people, healthy volunteers welcome
- Sponsor
- Fangbiao Tao
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, Progressive
Contact Lens and Myopia Control in Optometry School Students
The purpose of the study is to determine the effect of Natural View Multifocal lenses, a soft multifocal lens, on retardation of myopia in an optometric student population. Close up work (i.e.
- Trial name
- NCT04334369
- Testing
- Proclear Single Vision Contact Lenses manufactured by CooperVision, Proclear Multifocal Contact Lenses manufactured by CooperVision
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Jeff Rabin
Myopia, Progressive
Stellest Lens Wear in Adult Progressing Myopes
It is expected that myopia progression stabilises in the late teenage years, however, some studies report that myopia progression continues through early adulthood in as many as one third of myopes.
- Trial name
- SWAP (NCT06520124)
- Testing
- Essilor® Stellest® spectacle lens, Single-vision spectacle lens
- Where
- United Kingdom
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Children, Hyperopia
Efficacy of S.T.O.P®KIT in Retarding Axial Length Growth in Children With Low Hyperopia
This is a multicenter, parallel-group, open-label, randomized controlled, superiority interventional clinical study initiated by investigators from Shanghai General Hospital (Study Protocol No.: IT-CRU-FAMB-001, Version V1.1…
- Trial name
- NCT07401511
- Testing
- Attaching different phase Dynamic Spatiotemporal Optical Films (S.T.O.P® KIT) when wearing spectacle frames
- Where
- 3 sites in China
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine
Myopia, Myopia, Progressive
Myopia Progression With a Novel Extended Depth of Focus Contact Lens
Myopia has been increasing in prevalence and severity throughout the world over the last 30 years. Increasing levels of myopia are associated with increased frequencies and severity of various ocular pathologies, including…
- Trial name
- NCT03358862
- Testing
- NaturalVue Multifocal Contact Lens
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Aller, Thomas A., OD
Refractive Errors, Axial Length, Eye
Optical Biometry and Spherical Aberration in Ametropic and Emmetropic Eyes
Aberrations play a significant role in the visual process and can be divided in lower-order and higher-order aberrations. The former can be measured using the commercially available IOL Master (Carl Zeiss Meditec AG, Germany) and…
- Conditions
- Refractive Errors, Axial Length, Eye, Corneal Wavefront Aberration
- Trial name
- NCT01663597
- Where
- Austria
- Volunteers
- 160 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Axial Length (AL), Anterior Chamber Deep (ACD)
A-mode vs PalmScan Ultrasonography: Biometric Measurements.
Ultrasonography has become a critical ancillary test in the clinical practice of ophthalmology. It is commonly used as a standardized method for assessing intraocular biometry.
- Conditions
- Axial Length (AL), Anterior Chamber Deep (ACD), Lens Thickness (LT)
- Trial name
- NCT00804869
- Testing
- PalmScan A2000 ultrasonography system (Micro Medical Devices, Calabasas, CA), Standard A-mode ultrasound (Eye Cubed™, Ellex, Adelaide, Australia).
- Where
- Mexico
- Volunteers
- healthy volunteers welcome
- Sponsor
- Asociación para Evitar la Ceguera en México
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
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