Clinical trials: Refractive Disorders
Visual Impairment, Hearing Loss
Survey of Sensory Impairment Indicators Among Adults Aged 65 Years and Older in Xinxing County
This cross-sectional population-based survey will be conducted among residents aged 65 years and older in Xinxing County, Yunfu, Guangdong Province, China.
- Conditions
- Visual Impairment, Hearing Loss, Dual Sensory Impairment, Cataract
- Trial name
- NCT07694505
- Where
- China
- Volunteers
- 2,854 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Glaucoma, Suspect, Diabetic Retinopathy
Eye Health Intervention Study in Upper Manhattan
Individuals living in Upper Manhattan have limited access to eye care, high vision impairment rates, and poor ocular health outcomes.
- Conditions
- Glaucoma, Suspect, Diabetic Retinopathy, Cataract, Refractive Errors
- Trial name
- EYES-UM (NCT06112431)
- Testing
- Intervention, Usual Care
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Columbia University
Visual Impairment, Refractive Error
Frequency of Visual Impairment Among School Children and Effectiveness of mHealth Referral Reminder on Uptake of Referral Services
This study tested whether mobile health (mHealth) tools can affect referral uptake among schoolchildren with vision problems.Visual impairment in children often goes untreated in low- and middle-income countries, even when…
- Trial name
- NCT06616051
- Testing
- Multicomponent SMS reminder
- Where
- Pakistan
- Volunteers
- 320 people, healthy volunteers welcome
- Sponsor
- Syed Fawad Mashhadi
Refractive Assessment, Refractive Disorders
Algorithm-assisted Subjective Refraction Program Dedicated to Children
Current refraction assessment in children is dependent on the Eye Care Specialist and lacks standardization. Essilor has developed new algorithm assisted subjective refraction software dedicated to children of 6-12 years old and…
- Conditions
- Refractive Assessment, Refractive Disorders, Hyperopia and Myopia, Astigmatism
- Trial name
- NCT07046065
- Testing
- Non-cycloplegic Objective refraction, Non-cycloplegic conventional subjective refraction, Non-cycloplegic subjective refraction (Kids refraction software vA with Vision-R™)
- Where
- Portugal
- Volunteers
- 166 people, healthy volunteers welcome
- Sponsor
- Essilor International
Accommodation Disorder, Keratoconus
Clinical Investigation for a Multifunction Ophthalmic Measurement Device
The purpose of this clinical investigation is to evaluate the clinical utility of a multifunctional measuring device for Ophtalmology.
- Conditions
- Accommodation Disorder, Keratoconus, Dry Eye, Refractive Errors
- Trial name
- NCT06565091
- Testing
- Measurements of physiological parameters of the anterior chamber, Measurements of the Axial biometry
- Where
- France
- Volunteers
- 378 people, healthy volunteers welcome
- Sponsor
- Essilor International
Refractive Errors
Anxiety-related Fixation Instability During LASIK
Anxiety is common among patients undergoing eye surgery, which is typically performed under topical anesthesia while the patient is awake.
- Trial name
- NCT06148428
- Testing
- Laser in situ keratomileusis (LASIK)
- Where
- Egypt
- Volunteers
- 2,435 people, healthy volunteers welcome
- Sponsor
- Assiut University
Cycloplegia, Refractive Errors
Cycloplegic Refraction in Pediatric Patients With Esotropia
The primary outcome of this study is to compare cyclopentolate 1% and tropicamide 1% for cycloplegic refractions in pediatric populations with esotropia.
- Conditions
- Cycloplegia, Refractive Errors, Esotropia, Vision Disorders
- Trial name
- NCT06077682
- Testing
- Cyclopentolate, Tropicamide
- Where
- 2 sites in Jordan, Qatar
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Islamic Hospital, Jordan
Visual Acuity, Refractive Errors
Assessment of Visual Acuity in Refugee Population
The present research process is a prospective clinical study that will be conducted under the auspices of the Democritus University of Thrace (DUTH) in the open accommodation structure for refugees and immigrants of Kavala…
- Conditions
- Visual Acuity, Refractive Errors, Low Vision, Vision Disorders
- Trial name
- NCT05209581
- Testing
- Distance Visual Acuity Examination
- Where
- Greece
- Volunteers
- 330 people, healthy volunteers welcome
- Sponsor
- Democritus University of Thrace
Visual Acuity, Refractive Errors
Pre-symptomatic Screening of Visual Acuity in Pre-school Students
The present research process is a prospective, non-interventional clinical study that will be conducted -under the auspices of the Democritus University of Thrace (DUTH)- in the pre-school students of the city of Alexandroupolis…
- Conditions
- Visual Acuity, Refractive Errors, Low Vision, Vision Disorders
- Trial name
- NCT05835193
- Testing
- Diagnostic Test: Distance Visual Acuity Examination
- Where
- Greece
- Volunteers
- 1,098 people, healthy volunteers welcome
- Sponsor
- Democritus University of Thrace
Refractive Errors, Vision Disorders
Handheld Device Compared With a Standard Eye Care Diagnostic Device in Measuring Ophthalmic Refraction
This study is exploratory and examines whether the best-corrected visual acuities (BCVA's) from trial frames created with the refraction results obtained from a novel handheld optical device yields results similar to the…
- Trial name
- NCT04693247
- Testing
- EQ103
- Where
- United States
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- EyeQue Corp.
Vision Disorders, Refractive Errors
Rapid Computerized Visual Acuity Test
A novel computerized visual acuity test was developed and tested on both healthy persons and patients with ocular conditions. Visual acuity outcomes of the computerized test will be compared to the Early Treatment Diabetic…
- Conditions
- Vision Disorders, Refractive Errors, Retinal Disease, Cataract
- Trial name
- NCT05447845
- Testing
- Computerized visual acuity assessment program
- Where
- Israel
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Rambam Health Care Campus
Blindness,Visual Impairment, Refractive Error, Cataract, High Myopia, Aging
Shanghai Eye Study for Adults
Blindness and visual impairment severely impact the visual health and life quality of people, particularly the 2.566 million senior citizens aged at 65 and above in Shanghai.
- Trial name
- SESA (NCT03455478)
- Testing
- spectacles
- Where
- China
- Volunteers
- 1,000,000 people, healthy volunteers welcome
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Refractive Errors, Accommodation Disorder
Choroidal Thickness Change in Response to Physiological and Refractive Changes
There is a great need for precise and repeatable measurements of the choroidal thickness. Including the diurnal physiological changes, accommodation and refractive error impact on those measurements.
- Trial name
- NCT03906279
- Where
- Poland
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Wrocław University of Science and Technology
Refractive Error - Myopia Axial, Astigmatism
Refractive Accuracy of "2WIN" and Portable Autorefractors
Youth and some adults have photoscreening refractions and hand-held auto refraction before cycloplegia refraction during new and follow up eye examinations.
- Conditions
- Refractive Error - Myopia Axial, Astigmatism, Accomodation, Visual Impairment
- Trial name
- NCT04249505
- Testing
- "2WIN" Photoscreener, "Plusoptix A12", "Retinomax"
- Where
- United States
- Volunteers
- 708 people, healthy volunteers welcome
- Sponsor
- Alaska Blind Child Discovery
Refractive Errors, Myopia (Disorder)
Environmental Health and Myopia Prevention and Control
Myopia is one of the major causes of low visual acuity during childhood. It is generally more prevalent in urban areas than in rural areas.
- Trial name
- NCT04161326
- Where
- China
- Volunteers
- 100,000 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Refractive Error, Visual Impairment
The Baltimore Reading and Eye Disease Study
The Baltimore Reading and Eye Disease Study (BREDS) is a two year study to determine the prevalence of vision problems in an early school age population with reading difficulty.
- Conditions
- Refractive Error, Visual Impairment, Convergence Insufficiency, Reading Disabilities
- Trial name
- BREDS (NCT02607384)
- Testing
- Eyeglass wearing, Orthoptic exercises, Specialist referral
- Volunteers
- 328 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins University