Clinical trials: Contrast Sensitivity
Modulation Transfer Function, Visual Acuity
MTF Image Modifications
Human visual acuity and contrast sensitivity are highly dependent on various different parameters. Each should be optimized for perfect visual performance.
- Conditions
- Modulation Transfer Function, Visual Acuity, Contrast Sensitivity
- Trial name
- NCT01926704
- Where
- Austria
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
COPD, Asthma
Imaging Lung Function Using Oxygen Enhanced MRI
The goal of this study is to perform a pilot study to evaluate the utilization of oxygen as an inhaled contrast agent to image the airway spaces in normal and diseased human lungs to allow an effect size estimate to power future…
- Conditions
- COPD, Asthma, Cystic Fibrosis, Emphysema
- Trial name
- NCT01731015
- Testing
- Medical Grade Oxygen
- Where
- United States
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- Hal C Charles
Glaucoma
Spaeth/Richman Contrast Sensitivity Test
The Spaeth-Richman Contrast Sensitivity (SPARCS) test is a new method of assessing contrast sensitivity. The test, another way to measure vision, is performed on any standard computer with internet access.
- Trial name
- SPARCS (NCT01300949)
- Testing
- Spaeth/Richman Contrast Sensitivity Test, Pelli-Robson Contrast Sensitivity Chart
- Where
- United States
- Volunteers
- 314 people, healthy volunteers welcome
- Sponsor
- Wills Eye
Glaucoma
Building a Database of Results From People Without Eye Problems
The purpose of this study is to build a database of results from a new test that measures contrast sensitivity (the Spaeth-Richman Contrast Sensitivity Test (SPARCS)).
- Trial name
- SPARCS (NCT02627339)
- Where
- United States
- Volunteers
- 208 people, healthy volunteers welcome
- Sponsor
- Wills Eye
Primary Pterygium
The Effects of Primary Pterygium on Contrast Sensitivity Preoperatively and Postoperatively
Pterygium is the growth of conjunctival tissue onto the cornea, usually from the nasal quadrant of the cornea.Visual acuity may be reduced due to direct invasion of the visual axis or astigmatism induced by the pterygium.
- Trial name
- NCT03406390
- Testing
- Pterygium surgery
- Where
- China
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Myopia
Effects of Blue of Glasses VS Standard Lenses on Contrast Sensitivity & Visual Fatigue in Myopic & Non-Myopic Adults
This study investigates the effects of blue light-blocking glasses compared to standard lenses on contrast sensitivity and visual fatigue in myopic and non-myopic adults.
- Trial name
- NCT06739525
- Testing
- Blue Light-Blocking Glasses (Intervention Group), Standard Lenses (Control Group)
- Where
- Pakistan
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Superior University
Bipolar Depression
Neural and Visual Responses to Light in Bipolar Disorder: A Novel Putative Biomarker
Objective. Bipolar Disorders (BD) are a major public health problem. The investigators still lack knowledge of the mechanisms which contribute to BD.
- Trial name
- LightEyeBD (NCT02048995)
- Where
- United States
- Volunteers
- 91 people, healthy volunteers welcome
- Sponsor
- Northwestern University
Cataract
Evaluation of the EpiGlare Tester for the Measurement of Glare-Induced Changes in BSCVA in Subjects With and Without Cataracts
The EpiGlare Tester will identify visual disability resulting from the glare experienced by subjects with cataracts in the glare-induced change in best spectacle corrected visual acuity (BSCVA).
- Trial name
- NCT04739397
- Testing
- Glare Testing
- Where
- United States
- Volunteers
- 89 people, healthy volunteers welcome
- Sponsor
- Epico, LLC
Cannabis Dependence
Effects of Chronic Intake of Cannabis on Contrast Sensitivity
Rates of driving under the influence of cannabis have risen in recent years. Cannabis is involved in 1/3 of motor vehicle collisions.
- Trial name
- NCT01793961
- Testing
- electroretinogram, contrast sensitivity tests
- Where
- France
- Volunteers
- 95 people, healthy volunteers welcome
- Sponsor
- University Hospital, Strasbourg, France
Refractive Error, Cataract
Vision Measured by the Vimetrics CVA Compared With Chart Testing Under Similar Luminance and Contrast Conditions
Purpose of The Study: The purpose of this study is the following: A)To gather age-related normative visual acuity data for the Vimetrics Central Vision Analyzer (CVA, Vimetrics, LLC, Media, Pa) B)To gather visual acuity data for…
- Conditions
- Refractive Error, Cataract, Maculopathy
- Trial name
- NCT02028351
- Where
- 2 sites in United States, Austria
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Sinclair Technologies, LLC
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
Limbal Dermoid
Visual Quality and Contrast Sensitivity Function for Limbal Dermoid Children After Corneal Transplantation
This study is to inquiry the contrast sensitivity function in the 50 eyes of limbal dermoid children with keratoplasty with quick contrast sensitivity function (quick CSF) test, as well asa to analyze its relationship between…
- Trial name
- NCT03447041
- Where
- China
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Methods to Measure Contrast Vision
A Comparative Study of Six Methods to Measure Human Contrast Vision
This study evaluates the relative performance of different methods to measure the human spectral contrast sensitivity function (CSF).
- Trial name
- NCT02767284
- Testing
- UCST-V1, UCST-V2, UCST-V3
- Where
- Sweden
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Uppsala University
Myopia
Aberration-Free Refraction Correction
In the interest of improving visual quality after LASIK we have designed a multifaceted study to test the theoretical, physical, biomechanical and functional effects of commercial and independently designed aspherical ablation…
- Trial name
- NCT00172913
- Where
- Taiwan
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- National Taiwan University Hospital