Clinical trials: Visual Acuity
Normal Individuals
Normative Values for Instrumented Gaze Stabilization Test and Dynamic Visual Acuity Test Following Fatigue
The goal of this observational study is to learn how well normal individuals can see when they move their head before and after activity.
- Trial name
- NCT07847372
- Testing
- No intervention
- Where
- 2 sites in United States
- Volunteers
- 42 people
- Sponsor
- Cathey Norton
Ametropia, Myopia; Refractive Error
The Objective of This Study is to Evaluate the Perfomance of a Photorefraction Device for Screening Ametropia in Children. Eligible Participants Will Undergo Multiple Refractive Error Measurements, Visual Acuity and Strabismus Assessments During a Single Evaluation Visit.
The goal of this clinical trial is to evaluate the performance of a photorefraction screener in terms of sensibility, sensitivity and accuracy on children aged 3 to 8 y.o.
- Conditions
- Ametropia, Myopia; Refractive Error, Myopia; Astigmatism
- Trial name
- NCT06882408
- Testing
- Photorefraction device under investigation, Comparator device, Tabletop auto-refractometer, Comparator device, portable photorefraction device
- Where
- 2 sites in France
- Volunteers
- 315 people, healthy volunteers welcome
- Sponsor
- Essilor International
Myopia, Visual Rehabilitation
Exploring Perceptual Learning in Blurred Gabor Discrimination for Low-Myopic Children
This exploratory study investigates whether perceptual learning using blurred Gabor stimuli can improve uncorrected distance visual acuity in children aged 6-10 years with low myopia.
- Conditions
- Myopia, Visual Rehabilitation, Perceptual Learning
- Trial name
- NCT07107646
- Testing
- vision training system, VTS
- Where
- Taiwan
- Volunteers
- 30 people
- Sponsor
- National Taiwan University Hospital
Corneal Ulcer, Eye Infections, Fungal
The Mycotic Ulcer Treatment Trial II: A Randomized Trial Comparing Oral Voriconazole vs Placebo
The purpose of this study is to determine if the addition of oral voriconazole to topical treatment regimens results in lower rates of perforation in severe fungal corneal ulcers.
- Trial name
- MUTTII (NCT00997035)
- Testing
- Voriconazole
- Where
- 7 sites in United States, India and 1 more
- Volunteers
- 240 people
- Sponsor
- University of California, San Francisco
Visual Impairment
Cell Phone Application for Vision Assessment
The purpose of this study is to evaluate how visual acuity assessed with Peek Acuity (a cell phone application to check visual acuity) among preschool and school-aged children 3 to less than18 years of age (1) compares to the…
- Trial name
- NCT03212222
- Testing
- Peek Acuity, Standard Visual Screening
- Where
- United States
- Volunteers
- 111 people, healthy volunteers welcome
- Sponsor
- Duke University
Cataract
PREVAIL VII: Cataract Surgery in Ebola Survivors
Objective: Zaire ebolavirus is a single-stranded RNA virus associated with high morbidity and mortality. The most recent epidemic of Ebola virus disease (EVD) in West Africa resulted in over 11,000 deaths and disabling sequelae…
- Trial name
- NCT03309020
- Testing
- Cataract surgery
- Where
- Liberia
- Volunteers
- 37 people
- Sponsor
- National Eye Institute (NEI)
Visual Acuity at Near, Accuracy of Accommodation
The Effect of Bifocals in Children With Down Syndrome
Visual acuity at near improves in children with Down syndrome using bifocals
- Conditions
- Visual Acuity at Near, Accuracy of Accommodation, Prevention of Strabismus, Task Readiness
- Trial name
- NCT02241356
- Testing
- bifocals, single vision glasses
- Where
- Netherlands
- Volunteers
- 120 people
- Sponsor
- Radboud University Medical Center
Endophthalmitis
Ozurdex Endophtamitis Cohort, Prognostic Assessment at 12 Months
OZURDEX endophthalmitis is a rare and potentially very serious pathology. Different treatments can be carried out early and change the functional prognosis of the patient.
- Trial name
- NCT06268561
- Testing
- Visual acuity analysis, Intraocular pressure analysis, Analysis of optical coherence tomography (OCT) images
- Where
- France
- Volunteers
- 8 people
- Sponsor
- Centre Hospitalier Universitaire de Saint Etienne
Myopia, Myopia Progression
Spectacle Lens Visual Acuity Assessments Study
This is a two-arm parallel group, non-dispensing study. Participants will be existing active CYPRESS Extension (CPRO-1802-002) subjects. Subjects will undergo additional visual performance assessments.
- Conditions
- Myopia, Myopia Progression, Juvenile Myopia
- Trial name
- CEDAR (NCT05650190)
- Testing
- Novel spectacle lens design, Spectacle lenses
- Where
- 6 sites in United States
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- SightGlass Vision, Inc.
Visual Impairment, Amblyopia Suspect
DigiVis: Self-testing Vision App for Telephone Consultations
This trial aims to assess the accuracy and test-retest variability of a new digital app which enables community visual acuity testing without requirement of an trained examiner.
- Trial name
- NCT04482387
- Testing
- DigiVis visual acuity app
- Where
- United Kingdom
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Cambridge University Hospitals NHS Foundation Trust
Corneal Ulcer, Eye Infections, Bacterial
Steroids for Corneal Ulcers Trial
The purpose of this study is to determine whether adding topical steroids improves the outcomes of bacterial corneal ulcers, especially visual acuity.
- Trial name
- SCUT (NCT00324168)
- Testing
- Antibiotics, Topical corticosteroid
- Where
- 5 sites in United States, India
- Volunteers
- 500 people
- Sponsor
- Thomas M. Lietman
Refractive Error Correction, Visual Acuity
Metric-Optimized Spectacle Prescriptions for Children With Down Syndrome
This study seeks to determine whether glasses prescriptions determined from computer analysis of detailed images of the eyes provide better vision outcomes for children with Down syndrome than prescriptions determined using…
- Trial name
- NCT07490444
- Testing
- Metric-optimized spectacles, Routine Clinical Spectacles
- Where
- United States
- Volunteers
- 24 people
- Sponsor
- Ohio State University
Amblyopia
Will Perceptual Learning Via Video Game Playing Improve Visual Acuity Stereopsis & Fixation Stability in Mild Amblyopes?
Contrast balanced dichoptic videogame training has been found to improve sensory functions in adults with amblyopia; best corrected distance visual acuity (BCVA) and stereopsis, but its effect on motor function, namely amblyopic…
- Trial name
- NCT02995174
- Testing
- Dichoptic video game in an i-Pod touch device, Video game in an i-Pod touch device
- Where
- Hong Kong
- Volunteers
- 23 people
- Sponsor
- The Hong Kong Polytechnic University
Myopia, Progressive
Double Helix Design Defocus Lens Spectacle (RACE) for Myopia Control
This study uses 1.585 double helix defocus lens PC lenses with a unique optical design that includes a globally coherent visible area and complementary left and right helices that can form clear images.
- Trial name
- NCT05894382
- Testing
- Double Helix Design Defocus Lens Spectacle (RACE), single-vision spetacle lens
- Where
- China
- Volunteers
- 236 people
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Amblyopia
Eye-tracking Based Amblyopia Training
An Eye-Tracking-Based Binocular Amblyopia Technology Improves Both Visual Acuity and Binocularity Screening A child is considered for the study after undergoing a standard of care and study-specific eye examinations (by a study…
- Trial name
- NCT05078099
- Testing
- CureSight
- Where
- Israel
- Volunteers
- 23 people
- Sponsor
- NovaSight
Visual Acuity
Eye Health in Children and Adolescents: Repeated Cross-sectional Survey
The investigator will take a mixed-methods approach to gather relevant information from both children or adolescents, and their parents on profiles of eye health, as well as routinely available indicators.
- Trial name
- NCT04433130
- Where
- China
- Volunteers
- 300 people
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Retinal Dystrophies, Color Vision Defects
Natural History Study of Inherited Retinal Diseases
This prospective, observational investigation seeks to delineate the interplay between chromatic vision deficits and both functional visual outcomes and anatomical retinal biomarkers in individuals affected by Inherited Retinal…
- Conditions
- Retinal Dystrophies, Color Vision Defects, Vision Disorders, Macular Degeneration
- Trial name
- MojiLVCDT (NCT07085533)
- Where
- China
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Zhongmou Therapeutics
Exudative Age-Related Macular Degeneration
Monocentric Retrospective Observational Study on Patients With Macular Degeneration
Main Objective: The main objective of this retrospective observational study was to describe the evolution of visual acuity measured on ETDRS (Early Treatment Diabetic Retinopathy Study) scale, for patients with exudative…
- Trial name
- ELOUAN (NCT02089503)
- Testing
- intravitreal injections of Lucentis
- Where
- France
- Volunteers
- 250 people
- Sponsor
- Hospital St. Joseph, Marseille, France
Tomography, Visual Acuity
Keratoconus - Screening in Patients With Downs Syndrome
The initial purpose of the study is to determine the true tomographic based age-specific prevalence of keratoconus among Danish patients with Downs Syndrome.
- Conditions
- Tomography, Visual Acuity, Refraction Error
- Trial name
- NCT07800975
- Where
- Denmark
- Volunteers
- 137 people
- Sponsor
- University of Aarhus
Retinopathy of Prematurity, Myopia
Prematurity and Ophthalmological Changes
Ophthalmological differences in school-aged children with and without a history of retinopathy of prematurity
- Trial name
- NCT06452524
- Testing
- axial length (AU) and anterior chamber depth (ACD), optical coherence tomography (OCT)
- Where
- Turkey (Türkiye)
- Volunteers
- 211 people, healthy volunteers welcome
- Sponsor
- Ankara City Hospital Bilkent