Clinical trials: Refractive Errors, open to volunteers
Cornea; Ectasia, Refractive Errors
Corneal Elastography and Patient Specific Modeling
The goal of this research is to develop measurement tools and simulation technology for characterizing and predicting individual responses to corneal treatments and for advancing understanding of corneal ectasia risk factors.
- Conditions
- Cornea; Ectasia, Refractive Errors, Keratoconus
- Trial name
- NCT03030755
- Testing
- Optical coherence tomography
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- The Cleveland Clinic
Cataract (Post-operative Cataract Surgery Follow-up), Refraction Error
Can Tailored Surgical Incisions Reduce Refractive Error and Dependence on Glasses After Cataract Surgery?
Astigmatism is a common cause of continued dependence on glasses after cataract surgery and may lead to patient dissatisfaction with surgical outcomes.
- Trial name
- AST-2 (NCT07623317)
- Testing
- Adapted clear corneal incisions
- Volunteers
- 100 people
- Sponsor
- Linkoeping University
Cataract, Refractive Errors
Strengthening Community- to- Hospital Eye Care Pathways From Boko Eye Care Center in Rural Assam
This operational research project aims to strengthen continuity of eye care delivery between community screening and hospital-based treatment in rural Assam by redesigning referral pathways from the Boko Eye Care Center (ECC) to…
- Trial name
- NCT07333248
- Testing
- Experimental: Integrated Referral and Engagement Model
- Where
- India
- Volunteers
- 2,000 people
- Sponsor
- Seva Canada Society
Corneal Wavefront Aberration, Refractive Errors
Factors Influencing Subjective Visual Quality in Human Eyes
To assess subjective visual symptoms using the QoV questionnaire, measure pupil size using the Atongmu Pupillometer, measure wavefront aberrations using the OPD-Scan III Aberrometer, and measure/calculate the effective optical…
- Trial name
- NCT07518316
- Testing
- Corneal Refractive Surgery
- Volunteers
- 300 people
- Sponsor
- Tianjin Eye Hospital
Myopia: Refractive Error
Evaluation of Novel Spectacles Intended for Myopia Management in a Short-Term Study
The primary objective of this study is to evaluate the visual acuity, wearability, and quality of vision with two novel multifocal glasses designs in habitual myopia control glasses wearers, in a non-dispensing study after…
- Trial name
- NCT07497672
- Testing
- Habitual myopia glasses, Myopia Glasses A, Myopia Glasses B
- Volunteers
- 20 people
- Sponsor
- Myoptechs, Inc
Refractive Errors
Morphological Characteristics of the Maxillomandibular Region in a 3D Representation and the Refractive Status of the Eye
The goal of this observational study is to learn more about the relationship between the size and shape of the eye and the shape of the face in healthy young adults.
- Trial name
- NCT07460557
- Testing
- No intervention; Observational study
- Where
- Croatia
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- University of Zagreb
Refractive Errors
Cognitive Level Enhancement Through Vision Exams and Refraction
The investigators aim to conduct a mixed-method study in which a randomised controlled trial (RCT) and a descriptive qualitative study will be conducted.
- Trial name
- CLEVER (NCT05458323)
- Testing
- Free near and Distance Vision glasses
- Where
- India
- Volunteers
- 820 people
- Sponsor
- Queen's University, Belfast
Near Vision, Refractive Error Correction
Clinical Outcomes of the Use of a Femtosecond Laser Treatment in a Patient With Implanted Monofocal IOLs
This study aims to assess the safety and efficacy of evaluating near vision or refractive error in eyes implanted with a mono focal intraocular lens (IOL) using a low-energy femtosecond laser.
- Trial name
- NCT07447622
- Testing
- Device
- Where
- Czechia
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Perfect Lens, LLC
Retinopathy of Prematurity (ROP), Prematurity Complications
Retinopathy of Prematurity - Visual Function and Retinal Structure
Children born prematurely may develop a characteristic retinal disease named retinopathy of prematurity (ROP). This disease could lead to retinal detachment and blindness.
- Conditions
- Retinopathy of Prematurity (ROP), Prematurity Complications, Cerebral Visual Impairment, Visual Field Defect
- Trial name
- NCT07427719
- Where
- Norway
- Volunteers
- 140 people
- Sponsor
- Oslo University Hospital
Myopia, Refractive Error
An Evaluation of Myopia Control Lenses on Wearing Experience in Myopic Children
The goal of this research study is to understand the wearing experience of A.M.L. series of lenses in myopic children. The main questions it aims to answer are: How quickly and effectively children adapt to the A.M.L.
- Trial name
- NCT07354945
- Testing
- A.M.L. Series of Lenses
- Where
- China
- Volunteers
- 40 people
- Sponsor
- Essilor International
Refractive Errors
Clinical Data Collection of Myopic Patients After PTK-PRK With CZM MEL 90 Excimer Laser
The objective of the clinical investigation presented to is to verify predictions of post-operative PTK-PRK refractive outcome made by the EpiMaster application software by comparing these to post-operative clinical data after…
- Trial name
- NCT06996353
- Testing
- PTK-PRK refractive treatment
- Where
- 2 sites in India
- Volunteers
- 150 people
- Sponsor
- London Vision Clinic
Visual Acuity, Refractive Errors
Assessing the Turkish DDIVAT for Visual Acuity Measurement
The goal of this observational methodological study is to validate the Turkish version of the DDIVAT visual acuity measuring device in a Turkish-speaking adult population.
- Conditions
- Visual Acuity, Refractive Errors, Myopia, Hyperopia
- Trial name
- NCT07240480
- Testing
- DDIVAT Visual Acuity Test (Turkish Version)
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Trakya University
Refractive Errors, Cataract
Xinxing Eye Cohort Study
To establish the baseline levels and monitor the progress of two newly introduced global eye health indicators in Xinxing County, including effective refractive error coverage (eREC) and effective cataract surgery coverage…
- Trial name
- NCT07257536
- Volunteers
- 3,000 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen 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
Pterygium, Corneal Astigmatism
Comparison Of Keratometric Readings Pre and Post Pterygium Excision With Conjunctival Autograft Transplantation
Pterygium, often called "surfer's eye," is a common eye condition in which a raised, fleshy growth of tissue extends from the white part of the eye onto the clear cornea.
- Trial name
- NCT07198126
- Testing
- Pterygium Excision with Conjunctival Autograft
- Where
- Pakistan
- Volunteers
- 130 people
- Sponsor
- Mughal Eye Trust Hospital
Myopia, Light; Therapy, Complications
Optimizing Light Exposure for Myopia Prevention and Control (LightSPAN)
The goal of this clinical trial is to evaluate whether the optimization of daily exposure to light in primary school children can lead to better myopia prevention and control.
- Conditions
- Myopia, Light; Therapy, Complications, Myopia Progression, Short-Sighted
- Trial name
- LightSPAN (NCT06631339)
- Testing
- Light Intervention, Digital Intervention, Control Group
- Where
- 5 sites in Singapore
- Volunteers
- 396 people, healthy volunteers welcome
- Sponsor
- National University of Singapore
Myopia; Refractive Error
Measuring Changes In Choroidal Thickness Induced By Prototype Soft Contact Lenses Worn For 1 Hour
The objective of the study is to evaluate the short-term change in choroidal thickness induced by 3 prototype soft contact lenses for people with myopia.
- Trial name
- ARCTIC (NCT07155551)
- Testing
- Lens A, Lens B, Lens C
- Where
- Canada
- Volunteers
- 20 people
- Sponsor
- Myoptechs, Inc
Astigmatism, Presbyopia
North American Comfilcon A Clinical Study
The main objective of this study is to demonstrate acceptable safety and effectiveness (performance) of comfilcon A Sphere, Toric, Multifocal, Toric Multifocal and Energys lenses, when used in the general population.
- Conditions
- Astigmatism, Presbyopia, Ametropia
- Trial name
- NCT06902584
- Testing
- comfilcon A Sphere lens, comfilcon A Toric lens, comfilcon A Multifocal lens
- Where
- 4 sites in United States
- Volunteers
- 182 people
- Sponsor
- CooperVision International Limited (CVIL)
Glaucoma, Diabetic Retinopathy (DR)
"My Eyes, My Light": Amar Chokh, Amar Alo
Eye disease affects 2.2 billion people globally, which in turn adversely affects schooling, economic productivity, and participation in social life.
- Conditions
- Glaucoma, Diabetic Retinopathy (DR), Hypertensive Retinopathy, Cataract
- Trial name
- ACA2 (NCT07135570)
- Testing
- Multimodal Screening for Eye Disease, cataract surgery
- Where
- Bangladesh
- Volunteers
- 20,000 people, healthy volunteers welcome
- Sponsor
- Data Yakka, Inc.
Myopia
Clinical Investigation of a Novel Spectacle Lens on Slowing Down Juvenile Myopia Progression
The goal of this exploratory clinical trial is to evaluate the efficacy and safety of a test spectacle lens (standard single vision lens (SVL) during first year, and standard myopia control lens (MCL) in second year), designed…
- Trial name
- NCT06850168
- Testing
- SVL, SVL with passive red-light emission, MCL
- Where
- Singapore
- Volunteers
- 35 people
- Sponsor
- Essilor International