Clinical trials: Contrast Sensitivity
Visual Fatigue
Visual Discomfort and Reading
Reading can be an uncomfortable and difficult task for some people. Symptoms include unpleasant somatic and perceptual effects, such as eye-strain, headache, and blurred text, despite normal visual acuity.
- Trial name
- NCT00402155
- Testing
- Stress on visual discomfort
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Southern California College of Optometry at Marshall B. Ketchum University
Immunotherapy
Compatibility and Immunogenicity of a Short Specific Immunotherapy (SIT) in Contrast to Classic Specific Immunotherapy
We wanted to examine the immunogenicity and safety of a shortened specific immunotherapy in contrast to the standard specific immunotherapy.
- Trial name
- NCT00540150
- Testing
- specific subcutaneous immunotherapy house dust mite allergoid (Novo-Helisen Depot)
- Where
- Germany
- Volunteers
- 34 people
- Sponsor
- Johann Wolfgang Goethe University Hospital
Heart Disease, Cystic Fibrosis
Dynamic Contrast Enhanced Magnetic Resonance Perfusion Imaging in Congenital Heart Disease and Lung Disease
The primary objective of this study is to determine if quantitative Dynamic contrast-enhanced magnetic resonance (DCE MR) perfusion imaging accurately quantifies right and left pulmonary artery blood flow as compared with phase…
- Conditions
- Heart Disease, Cystic Fibrosis, Asthma
- Trial name
- NCT01192360
- Testing
- Phase contrast flow velocity mapping (PC), Dynamic contrast-enhanced magnetic resonance imaging
- Where
- Canada
- Volunteers
- 16 people
- Sponsor
- The Hospital for Sick Children
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
Contrast Enhanced X-ray Based Examination
A Study, Called UV Population, to Learn More About the Safety of the Study Drug Ultravist, Which is Given to Get Clearer X-ray Pictures, in People of Different Sexes, Races, and From Different Countries/Regions
This is an observational study in which patient data from the past of people who received Ultravist prior to an X-ray based scan are studied.
- Trial name
- NCT05428397
- Testing
- Iopromide (Ultravist, BAY86-4877)
- Where
- Germany
- Volunteers
- 152,233 people
- Sponsor
- Bayer
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
Myopia, Child Myopia Progression
Effect of MiYOSMART iQ Spectacle Lenses on Myopia Progression in Children
This prospective, single-center study aims to evaluate the efficacy and safety of MiYOSMART iQ spectacle lenses with DIMS (Defocus Incorporated Multiple Segments) and Triple Enhanced Design (TED) technology in slowing myopia…
- Trial name
- NCT07387159
- Testing
- MiYOSMART iQ spectacle lenses
- Where
- Russia
- Volunteers
- 70 people
- Sponsor
- Hoya Lens Rus LLC
Contrast Sensitivity
Contrast Sensitivity Assessment in Pediatric Cataract Surgery With IOL Implantation
The study evaluates contrast sensitivity in older children following surgery for lamellar and posterior subcapsular cataracts. Often, pediatric surgeons tend to delay surgery in these children who present beyond the amblyogenic…
- Trial name
- NCT01901744
- Testing
- Cataract Surgery
- Where
- India
- Volunteers
- 25 people
- Sponsor
- Iladevi Cataract and IOL Research Center
Allergic Rhinitis
Topical ASP-1001 (Contrast Media Formulation) and the Acute Response to Nasal Allergen Challenge (NAC)
The purpose of this study is to see whether ASP-1001 when given as a nasal spray is safe and can reduce the signs and symptoms of allergic rhinitis (hayfever) following nasal challenge with antigen.
- Trial name
- NCT00791102
- Testing
- ASP-1001 nasal spray
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Chicago
Loss of Visual Contrast Sensitivity, Near Vision
Visual Performance Following Implantation of Presbyopia Correcting IOLs
The purpose of the current study was to compare the visual performance after bilateral implantation of the Panoptix IOL , or the AT LISA IOL or Tecnis Symfony IOL .
- Conditions
- Loss of Visual Contrast Sensitivity, Near Vision, Visual Impairment
- Trial name
- NCT04907955
- Testing
- phacoemulsification with implantation of presbyopia correcting IOL
- Where
- Kuwait
- Volunteers
- 50 people
- Sponsor
- Dar Al Shifa Hospital
Healthy Nutrition, Healthy Diet
Baylor Infant and Toddler Biomarker of Nutrition Study
Young children rely on their foods and drinks for the nutrients they need to grow, like energy, protein, vitamins, and minerals.
- Trial name
- BITBONS (NCT05869760)
- Testing
- Carotenoid Intake, Serum carotenoid concentrations
- Where
- United States
- Volunteers
- 208 people, healthy volunteers welcome
- Sponsor
- Baylor College of Medicine
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
Appendicitis, Child
CT Scan Using IV Contrast Alone for Pediatric Appendicitis
Computed tomography (CT) scan using intravenous contrast (CT IV) as the sole type of contrast material, was studied as one method of evaluating children with suspected appendicitis.
- Conditions
- Appendicitis, Child, Contrast Media
- Trial name
- NCT00716703
- Testing
- CT Scan using IV contrast alone
- Where
- United States
- Volunteers
- 250 people
- Sponsor
- University of Rochester
Ophthalmological Disorder
Effect of Binocular Treatment Using a Dichoptic Reading Application in Children With Convergence Insufficiency.
Convergence insufficiency is a common disorder of binocular vision that can appear as early as childhood after visual effort, and is often associated with a variety of symptoms such as eyestrain, headaches, blurred vision and…
- Trial name
- ALEDICE (NCT06465615)
- Testing
- Self-education with dichoptic reading on tablet, Conventional orthoptic rehabilitation
- Volunteers
- 26 people
- Sponsor
- University Hospital, Montpellier
Lenses, Intraocular, Glistenings
Impact of Glistenings in AcrySof Intraocular Lenses on Visual Quality
This study will assess the impact of IOL glistenings on visual quality and function in patients implanted with a single-piece AcrySof intraocular lens (IOL) that exhibits glistening formations.
- Conditions
- Lenses, Intraocular, Glistenings, Visual Quality
- Trial name
- NCT01202981
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- University of Utah
Hypersensitivity
Role of Skin Tests for the Diagnosis of Immediate Hypersensitivity Reactions Due to Iodinated Contrast Media
The purpose of this trial is to study the diagnostic role of skin test in immediate reactions to iodinated radiocontrast media.
- Trial name
- NCT00819494
- Testing
- Skin tests with radiocontrast media
- Where
- Thailand
- Volunteers
- 63 people, healthy volunteers welcome
- Sponsor
- Chulalongkorn University
Adult Medulloblastoma, Childhood Medulloblastoma
Comparative Study of Sensitivity of Ga-DOTATOC PET vs Octreoscan SPECT + CT
This clinical trial studies gallium Ga 68-edotreotide positron emission tomography (PET)/computed tomography (CT) compared with indium In 111 pentetreotide plus contrast-enhanced CT (or MRI) in diagnosing patients with…
- Conditions
- Adult Medulloblastoma, Childhood Medulloblastoma, Neuroblastoma, Neuroendocrine Tumor
- Trial name
- NCT01869725
- Testing
- gallium Ga 68-edotreotide, positron emission tomography/computed tomography, indium In 111 pentetreotide
- Where
- United States
- Volunteers
- 68 people
- Sponsor
- Sue O'Dorisio
Adverse Reaction to Drug, Allergic Reaction to Contrast Media
Assessment of Immediate Adverse Reactions From Dotarem in Children Under 2 Years of Age
Our primary outcome is to assess the safety of Dotarem in children <2 years old up to 24 hours after Dotarem injection. Patients will be monitored for any adverse events that occur for 2 hours following the completion of the MRI…
- Trial name
- NCT02609919
- Testing
- Gadoteric Acid
- Where
- United States
- Volunteers
- 150 people
- Sponsor
- St. Louis University
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