Clinical trials: Contrast Sensitivity
Cataracts, Visual Acuity Reduced Transiently
The Incidence of Glistenings in the 2017 Intraocular Lenses Made by Alcon and Abbott Medical Optics
The purpose of this study is to seek academic/non-industry research funding support to independently investigate the incidence and density of lens glistenings in cataract patients who are implanted with the latest generations of…
- Conditions
- Cataracts, Visual Acuity Reduced Transiently, Loss of Visual Contrast Sensitivity, Functional Visual Loss
- Trial name
- NCT03409185
- Testing
- Alcon 1 piece SA60AT lens, AMO 1-piece AABOO lens
- Where
- Canada
- Volunteers
- 22 people
- Sponsor
- University of Toronto
Excess Skin of Both Eyelids, Contrast Sensitivity
The Effect of Upper Blepharoplasty on Vision Quality in the Early Postoperative Period
Contrast sensitivity (CS) and tear film (TF) changes are noted in late postoperative period after upper blepharoplasty (UB), while the same was rarely investigated in the early postoperative period.
- Conditions
- Excess Skin of Both Eyelids, Contrast Sensitivity, Tear Film Insufficiency of Both Eyes, Corneal Topography
- Trial name
- NCT05549713
- Testing
- Upper blepharoplasty
- Where
- Croatia
- Volunteers
- 40 people
- Sponsor
- Osijek University Hospital
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
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
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
Nephrotoxicity of CT Contrast Agents, CT Scans in Those With Renal Compromise
Can Ultrasound Replace Computed Tomography (CT) Scan in Those Unable to Have Computed Tomography (CT) Contrast Agents
Computed tomography (CT) scan, performed with contrast enhancement, is one of the most commonly requested examinations in diagnostic imaging.
- Conditions
- Nephrotoxicity of CT Contrast Agents, CT Scans in Those With Renal Compromise, Sensitivity to CT Contrast Agents, US With CEUS as Replacement for Unenhanced CT Scan
- Trial name
- CEUS_CT (NCT01151566)
- Where
- Canada
- Volunteers
- 250 people
- Sponsor
- Foothills Medical Centre
Multiple Sclerosis
Vision Assessment With the Quick Contrast Sensitivity Function (qCSF) Method in Healthy Controls and MS
Victor2 is an observational cohort study over two years and is designed to investigate longitudinal changes of visual impairment in multiple sclerosis (MS).
- Trial name
- VICTOR2 (NCT03703180)
- Where
- Germany
- Volunteers
- 200 people
- Sponsor
- Universitätsklinikum Hamburg-Eppendorf
Healthy
Test-Retest Variability of Quick Contrast Sensitivity Function Testing
The contrast sensitivity function (CSF) provides a comprehensive characterization of spatial vision and predicts functional vision better than visual acuity, but long testing times prevent its psychophysical assessment in…
- Trial name
- NCT02177669
- Testing
- quick Contrast Sensitivity Function test
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Nova Southeastern University
Contrast Media Allergy
Persistence of Sensitization to Contrast Media
The study aims to evaluate the persistence of IgE-mediated allergy to contrast media (CM) after a second exposure in patients who tested positive at both the first and second evaluations for CM allergy.
- Trial name
- PersensPC (NCT07409051)
- Testing
- Skin testing, Baseline serum tryptase measurement
- Where
- France
- Volunteers
- 100 people
- Sponsor
- University Hospital, Montpellier
Myopia
Visual Outcomes and Contrast Sensitivity After Myopic LASIK
Evaluate visual outcomes and contrast sensitivity for subjects undergoing bilateral myopic LASIK procedure using the 200 kHz WaveLight® FS200 Femtosecond Laser and the WaveLight® Allegretto Wave® Eye-Q Laser.
- Trial name
- NCT01746589
- Testing
- bilateral myopic LASIK
- Where
- United States
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Daniel S. Durrie, MD
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
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
Myopia
Visual Outcomes And Contrast Sensitivity After Myopic Wavefront-Optimized Lasik With Nexisvision Shield Or Bandage Contact Lens
Evaluate visual outcomes and contrast sensitivity for subjects undergoing bilateral myopic LASIK with a Nexisvision Shield or bandage contact lens placed postoperatively.
- Trial name
- NCT01706237
- Testing
- Nexisvision shield
- Volunteers
- healthy volunteers welcome
- Sponsor
- Durrie Vision
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
Contrast Medium
Study on the Risk of Allergy-like Reactions After Intra-arterial or Intra-venous Injection of the Marketed X-ray Contrast Medium Iopromid
Iopromide (trade name is Ultravist) is on the market for more than 30 years and has been used more than 250 million times as X-ray contrast medium for patients.
- Trial name
- UVIA (NCT03622801)
- Testing
- Iopromide (Ultravist, BAY86-4877)
- Where
- Germany
- Volunteers
- 133,331 people
- Sponsor
- Bayer
Fuch's Endothelial Dystrophy, Cataracts
Study of the Effect of Aspheric Lenses in Patients With Fuch's Dystrophy
The proposed study will recruit patients with mild to moderate Fuch's dystrophy who need cataract surgery alone. They will be randomly assigned to receive either spheric or aspheric lenses.
- Trial name
- NCT02109276
- Testing
- Spheric Sensar(R) 3-piece IOL, Aspheric Tecnis(R) 3-piece IOL
- Where
- Canada
- Sponsor
- Queen's University
Cataract
Spherical Aberration and Contrast Sensitivity Function in Eyes Implanted With Spherical and Aspheric Intraocular Lenses: A Clinical Trial
Aspheric intraocular lenses can effectively reduce higher-order aberrations and improve contrast sensitivity function after cataract surgery.
- Trial name
- NCT01028872
- Testing
- Intraocular lens
- Where
- Iran
- Sponsor
- Shahid Beheshti University of Medical Sciences
Glaucoma
Unravelling the Effects of Nicotinamide/Pyrroloquinolone Quinone /Citicoline/Homotaurine Fixed Combination on Contrast Sensitivity, Quality of Life, and Reading Performance in Glaucoma
Glaucoma is a chronic, progressive neuro-ophthalmic condition that leads to irreversible loss of retinal ganglion cells (RGCs) and is the second leading cause of blindness worldwide.
- Trial name
- NCT07861243
- Testing
- Citicoline 500 MG (Optigen) for 4 months, citicoline 500 mg + nicotinamide 54 mg + PQQ 5 mg + Homotaurine 50 mg fixed combination tablet (Neuprozin mito)
- Where
- Italy
- Volunteers
- 44 people
- Sponsor
- Università degli Studi 'G. d'Annunzio' Chieti e Pescara
Dysphotopsia, Posterior Capsule Opacification
Clinical Evaluation of Low Contrast Visual Performance and Low Light Phenomena in Patients With Various Intraocular Lens Implants
The goal of this clinical investigation is to evaluate visual acuity and contrast sensitivity in low lighting conditions using several different testing devices, and measure nighttime side effects of intraocular lens (IOL)…
- Conditions
- Dysphotopsia, Posterior Capsule Opacification, Visual Acuity, Visual Function
- Trial name
- NCT07213167
- Where
- United States
- Volunteers
- 120 people
- Sponsor
- Dr. Daniel H. Chang, MD
Crohn Disease, Food Allergy
Contrast-enhanced Ultrasound in Patients With Crohn´s Disease and Food Allergy
The purpose of this study is to investigate differences of the bowel wall thickness visible in conventional ultrasound and bowel perfusion using quantitative Contrast-Enhanced Ultrasound in patients with Crohn´s disease in…
- Trial name
- NCT05768971
- Testing
- Mild diet, Provocative diet
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- Friedrich-Alexander-Universität Erlangen-Nürnberg