Clinical trials: Retinal Function
Safety
FDA Phase IV - Commitment - Retinal Function Study
Vardenafil (Levitra) and Sildenafil (Viagra) are drugs that are marketed for use in patients with erectile dysfunction. The purpose of this study is to find out if there are any changes in the eye after taking at least 15 doses…
- Trial name
- NCT00461565
- Testing
- Sildenafil, Vardenafil (Levitra, BAY38-9456)
- Volunteers
- 63 people, healthy volunteers welcome
- Sponsor
- Bayer
Diabetic Retinopathy, Age-Related Macular Degeneration
Function and Structure Imaging in Different Retinal Diseases: Retinal Leakage Analyzer Versus Optical Coherence Tomography
The main objective of this observational study is to characterize and correlate functional and structural changes at the retinal level using the Retinal Leakage Analyzer (RLA) and the Optical Coherence Tomograph (OCT).
- Conditions
- Diabetic Retinopathy, Age-Related Macular Degeneration, Macular Edema
- Trial name
- NCT00797524
- Where
- Portugal
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- Association for Innovation and Biomedical Research on Light and Image
Retinopathy
Study of Stimulus Parameters in Flicker Electroretinogram (ERG)
The electroretinogram (ERG) is a diagnostic test that measures the electrical activity generated by cells in the retina in response to a light stimulus. Typically, an ERG is recorded with white flash when the pupil is dilated.
- Trial name
- NCT02466607
- Testing
- RETeval color flicker ERG, RETeval dilated versus un-dilated flicker ERG, pupil dilation
- Where
- United States
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- LKC Technologies, Inc.
Retinal Vein Occlusion, Macular Edema
Efficacy of an Intravitreal DEX Implant in Retinal Vein Occlusion Following Treatment With Anti-VEGF Injections.
To test the efficacy of a 0.7 mg intravitreal dexamethasone implant (Ozurdex®) on macular function and recalcitrant macular edema associated with retinal vein occlusion following treatment with 2 or more prior intravitreal…
- Trial name
- NCT01449682
- Testing
- Ozurdex
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Retina Macula Institute
Age Related Macular Degeneration, Glaucoma
Prospective Study Phase: Retinal Oxygen Saturation, Blood Flow, Vascular Function and High Resolution Morphometric Imaging in the Living Human Eye
Canadians fear loss of vision more than any other disability. Vision loss has an enormous impact on quality-of-life and is extremely costly from a societal and economic perspective.
- Conditions
- Age Related Macular Degeneration, Glaucoma, Diabetic Retinopathy.
- Trial name
- NCT01348672
- Where
- Canada
- Volunteers
- 381 people, healthy volunteers welcome
- Sponsor
- University of Toronto
Ocular Physiology, Regional Blood Flow
Effects of Vitamin C on Hyperoxia-Induced Reduction of Retinal Blood Flow
High arterial blood oxygen tension leads to vasoconstriction of retinal vessels, possibly related to an interaction between reactive oxygen species and endothelium-derived vasoactive factors.
- Trial name
- NCT00712907
- Testing
- vitamin C (Mayrhofer) 24mg/min i.v. for 64 min, 100% O2 (AGA) two times for 12 min
- Where
- Austria
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Erectile Dysfunction
Fundus Oculi and Erectile Dysfunction
The purpose of this study is to evaluate the correlation between fundus oculi's vascularization in patients with erectile dysfunction and not, and, in the same patients, before and after using drugs for ED.
- Trial name
- NCT02845765
- Testing
- Dynamic Vessel Analyzer (DVA), Phosphodiesterase type 5 Inhibitor (PDE5I)
- Where
- Italy
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Ospedale San Raffaele
Genetic Polymorphism, Macular Degeneration
Does Complement Factor H Gene Polymorphism Play a Role in the Regulation of Vascular Tone in the Choroid?
Age related macular degeneration (AMD) is a multifactorial disease with a strong genetic component. Most importantly a genetic polymorphism in the gene encoding for the complement factor H (CFH) has been recently identified which…
- Conditions
- Genetic Polymorphism, Macular Degeneration, Regional Blood Flow, Ocular Physiology
- Trial name
- NCT00708929
- Testing
- Squatting
- Where
- Austria
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Retinopathy of Prematurity, Neurodevelopmental Abnormality
Analysis of Ocular and Neurodevelopmental Function for Retinopathy of Prematurity
The goal of this research project is to identify the long-term outcome of neurodevelopment in patients with retinopathy of prematurity(ROP) and the treatment of anti-vascular endothelial growth factor (VEGF) such as intravitreal…
- Trial name
- NCT05186155
- Testing
- Severe ROP
- Where
- Taiwan
- Volunteers
- 510 people, healthy volunteers welcome
- Sponsor
- Chang Gung Memorial Hospital
Endothelial Function (FMD), Preeclampsia
Identifying Biomarkers for Endothelial Dysfunction in Women With Preeclampsia
Every pregnancy has a major impact on a woman's heart and blood vessels due to changes required by the body to maintain proper blood flow between mother and foetus.
- Conditions
- Endothelial Function (FMD), Preeclampsia, Retinal Vessels
- Trial name
- DAISY (NCT07084727)
- Testing
- Arterial stiffness, Flow-meditad dilatation, Dynamic retinal vessel analyzer
- Where
- Belgium
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University Hospital, Antwerp
Ocular Physiology, Regional Blood Flow
Effects of Indomethacin on Retinal and Choroidal Blood Flow in Healthy Volunteers
Prostaglandins (PG) are known to alter regional ocular blood flow and exhibit vasoactive properties in isolated ocular blood vessels.
- Trial name
- NCT00275730
- Testing
- indometacine (drug) effect on ocular blood flow
- Where
- Austria
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Dementia
Circadian Rhythm and Other Factors in Memory Clinic Patients
The CIRCAME study is a bicentric study of patients from 2 memory clinics in Paris. The main objective is to identify circadian rhythm components and other individual risk factors (sociodemographic, behavioral, and health related…
- Trial name
- CIRCAME (NCT05977712)
- Testing
- Questionnaire, Clinical examination, Accelerometer port
- Where
- 2 sites in France
- Volunteers
- 1,200 people, healthy volunteers welcome
- Sponsor
- Assistance Publique - Hôpitaux de Paris
Uveitis, Iritis
Retinal OCT and (mfERG) Related to Age, Sex, and the Use of Anti-inflammatory Medications
Retinal optical coherence tomography (OCT) is an established technology which enables a detailed cross-sectional visualization of the retinal micro-anatomy, and an objective measurement of its thickness in-vivo.
- Conditions
- Uveitis, Iritis, Iridocyclitis, Anterior Uveitis
- Trial name
- NCT00476593
- Testing
- Diclofenac, Dexamethasone
- Where
- 2 sites in Norway
- Volunteers
- 218 people, healthy volunteers welcome
- Sponsor
- Norwegian University of Science and Technology
Hypertension, Retinal Disorder
DETECT and Retinal Outcomes in Hypertension
The purpose of this study is to study the impact of blood pressure on cognitive performance.
- Conditions
- Hypertension, Retinal Disorder, Cognitive Impairment
- Trial name
- NCT01815567
- Where
- United States
- Volunteers
- 234 people, healthy volunteers welcome
- Sponsor
- Emory University
Cognitive Performance, Age-Related Macular Degeneration
Lutein, Zeaxathin, and Fish Oil Supplementation
The goal of this clinical trial is to learn the impact of lutein, zeaxanthin, and fish oil (LZF) supplementation in healthy adults.
- Conditions
- Cognitive Performance, Age-Related Macular Degeneration, Bone Loss
- Trial name
- NCT06489873
- Testing
- Active Comparator (Lutein, zeaxanthin, and fish oil supplement (LZF)
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Texas A&M University
Aging, Visual Perception
RePer-AGE: Reorganization of Visuo-cognitive Functions Based on Peripheral Vision With Aging
The RePer-AGE study investigates how central and peripheral vision contribute to visual recognition and how these mechanisms change with normal aging.
- Conditions
- Aging, Visual Perception, Cognition
- Trial name
- RePer-AGE (NCT07727369)
- Testing
- Psychophysical visual recognition tasks, Ophthalmological assessment, Functional magnetic resonance imaging (fMRI)
- Where
- France
- Volunteers
- 160 people, healthy volunteers welcome
- Sponsor
- University Hospital, Grenoble
Retinitis Pigmentosa
Development of Visual Function Evaluation Method
The objective of this study is to develop the comprehensive visual function evaluation method in severe visually impaired patient
- Trial name
- NCT03281005
- Where
- Japan
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Astellas Pharma Inc
Diabetes, Retinal Disorders
Rapid, Non-invasive, Regional Functional Imaging of the Retina. (Diabetic Retinopathy Diagnosis Device)
The basic objective of this project is to test a modification of existing technology for monitoring the responses of the pupil to light as a method for detecting regional losses of function of the retina.
- Trial name
- NCT01546766
- Testing
- Pupillometry testing.
- Where
- 2 sites in United States
- Volunteers
- 315 people, healthy volunteers welcome
- Sponsor
- University of California, Los Angeles
Alcohol Use Disorder
Study of Retinal Function Using Electroretinogram in Regular Alcohol Users
Alcohol is a major public health problem and its neurotoxic effects are, among other things, responsible for altering the functioning of cerebral neurotransmission pathways.
- Trial name
- ERICA (NCT03818971)
- Testing
- electroretinogram (flash, pattern and multifocal)
- Where
- France
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Centre Psychothérapique de Nancy
Ischemic Stroke
Correlation Between the Changes of Retinal Structure and Function and Ischemic Stroke
Ischemic stroke is the most common type of stroke, accounting for 60%-80% of all types of strokes, and is one of the leading global causes of death and severe disability.
- Trial name
- NCT05281887
- Where
- China
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Guangdong Provincial People's Hospital