Clinical trials: Visual Acuity
Age Related Cataracts
Visual Performance of Clareon PanOptix vs. a Comparable Multifocal Intraocular Lens
This is a two-part, multi-center, investigator-initiated clinical study comparing visual outcomes and patient satisfaction in subjects receiving bilateral implantation of either the Clareon PanOptix intraocular lens (IOL) or a…
- Trial name
- NCT07006428
- Testing
- Clareon PanOptix or PanOptix Toric IOLs, Comparable multifocal IOL
- Where
- 3 sites in United States
- Volunteers
- 290 people
- Sponsor
- Argus Research Center, Inc.
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
Macular Dystrophy
Correlation Between OCT and Mf-ERG Findings With BCVA in Patients With Macular Dystrophy
Correlation between optical coherence tomography and multifocal electroretinogram findings with visual acuity in patients with macular dystrophy.
- Trial name
- NCT07171541
- Testing
- OCT ,mFERG,VA test
- Volunteers
- 30 people
- Sponsor
- New Valley University
Macular Holes
Evaluation of Anatomic and Visual Outcomes of Initially Closed Macular Holes
To evaluate the anatomic and visual outcomes in patients with initially closed macular holes after vitreoretinal surgery and with one to seven years of follow-up.
- Trial name
- NCT01229657
- Where
- China
- Volunteers
- 79 people
- Sponsor
- Sun Yat-sen University
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
Visual Acuity
To Evaluate the Visual Performance After Bilateral Implantation of Multifocal Intraocular Lenses
To evaluate the visual performance after bilateral implantation of multifocal intraocular lenses.
- Trial name
- NCT03223857
- Testing
- Femtosecond-laser-assisted lens exchange
- Where
- Germany
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University Clinic Frankfurt
Visual Acuity
Objective Visual Acuity Measurement Using Suppression of the Optokinetic Nystagmus (OKN).
Suppression of the optokinetic nystagmus when a target is perceived can be applied to assess visual acuity objectively. Our aim is to establish prediction intervals for this optokinetic nystagmus suppression test (Speedwheel…
- Trial name
- Speedwheel (NCT04642495)
- Testing
- Visual acuity testing with SW , Landolt-"C" and Tumbling-"E" symbols
- Where
- Switzerland
- Volunteers
- 246 people, healthy volunteers welcome
- Sponsor
- University of Basel
Amblyopia, Amblyopia, Anisometropic
Stochastic Resonance Applied to Amblyopia Training and the Plasticity of Brain
The prevalence of Taiwan's population with amblyopia is 2-5%. Amblyopia affects the daily life and learning ability. The human visual system can be developed normally with exposure of clear images on the retina, which often drive…
- Trial name
- NCT04213066
- Testing
- Portable tablet
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- National Cheng-Kung University Hospital
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
Amblyopia, Amblyopia Unilateral
Valproate for the Treatment of Residual Amblyopia
The goal of this clinical trial is to determine the efficacy of valproate as an adjunct therapy to treat amblyopia beyond the critical period in children aged 8-17 years who have amblyopia of ≥3 lines of interocular…
- Conditions
- Amblyopia, Amblyopia Unilateral, Amblyopia, Anisometropic, Amblyopia Strabismic
- Trial name
- VARA (NCT07226141)
- Testing
- Valproate, Patch
- Where
- United States
- Volunteers
- 28 people
- Sponsor
- Boston Children's Hospital
Monochromatic, L- and S-cone Modulation Only
Evaluating How Well Different Types of Light-sensitive Cells in the Eye Contribute to Its Focusing Ability
In this experiment, subjects will view shapes on a screen with varying colors and be asked to focus their eyes on the shapes. The shapes will look as though they are jumping to random distances away from the eye.
- Conditions
- Monochromatic, L- and S-cone Modulation Only, L- and M-cone Modulation Only, M and S-cone Modulation Only
- Trial name
- NCT07691463
- Testing
- Color
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Rochester Institute of Technology
Home Vision, Office-Based Snellen Visual Acuity
Comparing a Home Vision Self-Assessment Test to Office-Based Snellen Visual Acuity in Myopic Children
This study aims to compare a home vision self-assessment test to office-based Snellen visual acuity in myopic children.
- Conditions
- Home Vision, Office-Based Snellen Visual Acuity, Myopic Children
- Trial name
- NCT06529367
- Testing
- Snellen chart
- Where
- Egypt
- Volunteers
- 80 people
- Sponsor
- South Valley University
Visual Acuity
Evaluating Visual Acuity and Initial Fit Performance of Two Soft Contact Lenses
This is a multi-center, randomized, controlled, double-masked, 2x2 cross-over, non-dispensing study to compare visual acuity and lens fit performance.
- Trial name
- NCT04954833
- Testing
- EMO-200, EMO-118
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Child, Motor Activity
CHAMPS Eye Study - Myopia and Retinal Vascular Geometry in Relation to Physical Activity
An increasingly physical inactive lifestyle in the Western World has led to a higher number of lifestyle -related diseases. The consequences are now already present in childhood with an increased prevalence of overweight…
- Conditions
- Child, Motor Activity, Myopia
- Trial name
- NCT02346006
- Testing
- More physical activity.
- Volunteers
- 307 people, healthy volunteers welcome
- Sponsor
- Odense University Hospital
Astigmatism Bilateral, Eyeglasses
Spectacle Prescribing in Early Childhood
The purpose of this study is to compare developmental outcome for young children (12 to 35 months of age) with astigmatism meeting American Academy of Ophthalmology spectacle prescribing guidelines and who are prescribed and…
- Trial name
- SPEC (NCT04728451)
- Testing
- Spectacle wear support, Spectacles
- Where
- United States
- Volunteers
- 88 people, healthy volunteers welcome
- Sponsor
- University of Arizona
Neuroathletic Training, Adolescent Basketball Players
Neuroathletic Training in Adolescent Basketball Players
This randomized controlled study aims to investigate the effects of neuroathletic training on dynamic visual acuity, endurance, balance, and injury risk in adolescent basketball players.
- Conditions
- Neuroathletic Training, Adolescent Basketball Players, Dynamic Visual Acuity, Injury Risk
- Trial name
- NCT07584148
- Testing
- neuroathletic training
- Where
- Turkey (Türkiye)
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Pamukkale University