Clinical trials: Change; Retina
Migraine
Retinal Nerve Fiber Layer Thickness Changes in Migraine: A Meta-Analysis of Case-control Studies
Optical coherence tomography (OCT) is a non-invasive retinal imaging technology that can provide high-resolution cross-sectional images of the peripapillary retinal nerve fiber layer (RNFL) and measure its thickness.
- Trial name
- NCT02196532
- Testing
- Device: Optical coherence tomography
- Where
- China
- Volunteers
- 500 people, healthy volunteers welcome
- Sponsor
- Yifan Feng
Ocular Inflammation
PGE2 Levels in Patient Treated With NSAIDs
The aim of this study is to determine vitreous levels of nonsteroidal antinflammatory drugs (NSAIDs) and prostaglandinE2 (PGE2) in eyes scheduled for vitrectomy. All patients received the study drugs for 3 days before surgery.
- Trial name
- NCT03597867
- Testing
- Dicloftil, Nevanac, Indom
- Where
- Italy
- Volunteers
- 104 people, healthy volunteers welcome
- Sponsor
- University of Trieste
Electroretinography
The Electroretinogram in Healthy and Glucose Intolerant Young Men
The purpose is to investigate the electroretinogram (ERG) in young, healthy men in the normoglycaemic and hyperglycaemic state before and after intervention with corticosteroids treatment, high calorie diet and exercise restraint.
- Trial name
- NCT01140932
- Testing
- Prednisolone, Lifestyle change
- Where
- Denmark
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Glostrup University Hospital, Copenhagen
Epilepsy (Treatment Refractory), Epilepsy
Retinal OCT Changes and Biomarkers in Drug-Resistant Epilepsy
This prospective, longitudinal observational study investigates whether epilepsy involves a progressive neurodegenerative process.
- Trial name
- NCT07716930
- Where
- Turkey (Türkiye)
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Kemal Tutkavul
Diabetic Retinopathy
OCTA in Epivascular Glia After Dex Implant
The aim of this prospective study was for the first time, to analyze specific morphologic features in diabetic eyes with macular oedema, such as changes of the foveal avascular zone and the presence of epivascular glia, and see…
- Trial name
- NCT05600179
- Testing
- Dexamethasone intravitreal implant
- Where
- Italy
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- Federico II University
Cardiovascular Diseases, Retina; Change
Imaging of Retinochoroidal Vasculature in Patients Being Assessed for Cardiovascular Disease
This study aims to determine whether changes in retinal vasculature seen on SS-OCTA can be correlated to degree of cardiovascular disease as measured by carotid duplex ultrasonography.
- Trial name
- NCT05082402
- Testing
- Swept Source Optical Coherence Tomography Angiography
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Northwestern University
Primary Open Angle Glaucoma
Electroretinogram and Retinal Vascular Changes After Cataract Surgery
To compare electrophysiological and Optical coherence tomography angiography of optic disc and macula changes after uneventful phacoemulsification between normal and cataractus patients with primary open angle glaucoma.
- Trial name
- NCT05871034
- Testing
- phacoemulsification
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Sohag University
Graves' Ophthalmopathy
Retinal Oxygen Saturation in Patients With Graves' Ophthalmopathy and in Normal People
Find if the retinal function is affected in both the nonsevere and the severe stage of Graves' ophthalmopathy (GO) by comparing the retinal oxygen saturation of GO patients with that of normal people.
- Trial name
- NCT02290704
- Where
- China
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Ocular Physiology, Retina
Is There a Difference in Flicker Induced Vasodilatation Between Smokers and Non-Smokers?
Habitual smoking is associated with an increased risk of coronary artery disease, cerebral and peripheral vascular disease, including ocular diseases like age-related macular degeneration or diabetic retinopathy.
- Conditions
- Ocular Physiology, Retina, Blood Flow Velocity
- Trial name
- NCT00431730
- Testing
- flicker light stimulation
- Where
- Austria
- Volunteers
- healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Parkinson Disease
Retinal Nerve Fiber Layer Thickness Changes in Parkinson Disease: A Meta-analysis
Optical coherence tomography (OCT) is a non-invasive retinal imaging technology that can provide high-resolution cross-sectional images of the peripapillary retinal nerve fiber layer (RNFL) and measure its thickness.
- Trial name
- NCT01928212
- Testing
- Optical coherence tomography
- Where
- China
- Volunteers
- 500 people, healthy volunteers welcome
- Sponsor
- Yifan Feng
Age-Related Macular Degeneration
Brain Connectivity in Age-Related Macular Degeneration
This study is to determine how cognitive deficits (e.g.,verbal fluency deficit) in patients with Age-Related Macular Degeneration (AMD) relate to specific aspects of brain and function.
- Trial name
- NCT01996215
- Where
- United States
- Volunteers
- 238 people, healthy volunteers welcome
- Sponsor
- Duke University
Retinal Artery Occlusion, Retinal Vein Occlusion
Changes in the Diameter of Retinal Vessels After Remote Ischemic Conditioning
Remote ischemic conditioning (RIC) is a therapeutic strategy for protecting organs or tissue against the detrimental effects of acute ischemia-reperfusion injury.
- Trial name
- NCT02898480
- Testing
- Remote ischemic conditioning
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Aarhus
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
Alzheimer Disease, Mild Cognitive Impairment
Atlas of Retinal Imaging in Alzheimer's Study
The Atlas of Retinal Imaging in Alzheimer's (ARIAS) study is a 5-year study examining the natural history of retinal imaging biomarkers associated with disease risk, disease burden, and disease progression in Alzheimer's disease…
- Conditions
- Alzheimer Disease, Mild Cognitive Impairment, Mild Dementia, Aging
- Trial name
- ARIAS (NCT03862222)
- Testing
- Retinal Imaging, Pupillometry, Contrast Sensitivity
- Where
- 4 sites in United States
- Volunteers
- 165 people, healthy volunteers welcome
- Sponsor
- University of Rhode Island
Thyroid Associated Orbitopathy
OCT Angiography Drived Alterations in Thyroid-associated Orbitopathy
The aim of this observational study is to evaluate retinal microvascular alterations in patients with thyroid-associated orbitopathy (TAO) using optical coherence tomography angiography (OCTA).
- Trial name
- TAO (NCT07341347)
- Where
- Croatia
- Volunteers
- 68 people, healthy volunteers welcome
- Sponsor
- Osijek University Hospital
Preeclampsia (PE), Hypertension ,Pregnancy
Retinal and Choroidal Microcirculation in Preeclampsia: An OCTA Study
Preeclampsia is a multisystemic and multifactorial disorder that complicates pregnancy and is characterized by new-onset hypertension after the 20th week of gestation accompanied by proteinuria or systemic findings such as renal…
- Conditions
- Preeclampsia (PE), Hypertension ,Pregnancy, Retinal Microvascular Changes, Hypertensive Disorders of Pregnancy
- Trial name
- PE-OCTA (NCT07874191)
- Where
- Turkey (Türkiye)
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Muğla Sıtkı Koçman University
Induced Defocus to the Retina
Defocus Induced Changes on Choroidal Thickness
The goals of this study are to assess the short-term (10-60 minutes) effects of different magnitudes of myopic and hyperopic optical defocus on the transient thickness of the choroid in children and adults, as well as to assess…
- Trial name
- NCT03954886
- Testing
- Plus powered optical lens
- Where
- United States
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- University of Houston
Type 1 Diabetes Mellitus With Artificial Pancreas Device
OCT and OCT-A Deep Learning in Diabetic Patients Wiht Artificial Pancreas Device
This study evaluates the ability of deep learning to improve the knowledge about structural and vascular retinal changes in diabetic patients undergoing artificial pancreas device, using optical coherence tomography angiography.
- Trial name
- NCT05809843
- Testing
- hybrid artificial pancreas systems (CSII)
- Where
- Italy
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Federico II University
Healthy Participants, Retinal Oxygen Extraction
Age-related Changes in Retinal Oxygen Extraction in Healthy Subjects
It has been found that several systemic and ocular diseases are associated with impaired retinal oxygen extraction. In the present study, retinal oxygen extraction will be measured in different age groups in order to identify age…
- Trial name
- NCT06643403
- Testing
- Oxygen 100% Gas for Inhalation
- Where
- Austria
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Twin Pregnancy, Antepartum Condition or Complication, Retinal Vascular
Comparison of Posterior Ocular Changes Between Singleton Pregnancy and Multifetal Pregnancy.
It has been known that a pregnant women undergoes significant anatomical and physiological changes that mainly caused by hormonal and hematologic changes during pregnancy.
- Conditions
- Twin Pregnancy, Antepartum Condition or Complication, Retinal Vascular, Choroidal Effusion
- Trial name
- NCT04773561
- Testing
- Corneal tomography, optical coherence tomography and optical coherence tomography angiography
- Where
- Thailand
- Volunteers
- 166 people, healthy volunteers welcome
- Sponsor
- Khon Kaen University