Clinical trials: Optic Disk
Glaucoma
To Evaluate the Effect of Ginkgo Biloba Extract on Optic Nerve Head Perfusion Examined Using OCTA
Glaucoma is defined as progressive neuropathy of the optic nerve. It is an important cause of irreversible blindness worldwide. Lowering the intraocular pressure is the only proven treatment for this neurodegenerative disease.
- Trial name
- GBE (NCT04846179)
- Testing
- Ginkgo biloba extract
- Where
- Canada
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- Nova Scotia Health Authority
Healthy
Role of Nitric Oxide in Optic Nerve Head Blood Flow Regulation During Experimental Increase of Intraocular Pressure in Healthy Humans
Autoregulation is defined as the ability of a vascular bed to adapt its vascular resistance to changes in perfusion pressure. In the eye, several studies have reported that retinal blood flow is autoregulated over a wide range of…
- Trial name
- NCT00914394
- Testing
- NG-monomethyl-L-arginine (L-NMMA), Phenylephrine, Laser Doppler Flowmetry
- Where
- Austria
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Fabry Disease
Clinical Investigation on the Blood Oxygenation at the Optic Nerve Head in Fabry Patients
This study aimed to evaluate blood oxygenation at the optic nerve head in relation with visual field losses observed in many Fabry patients. Data collected allowed to evaluate if there is a link between these two entities.
- Trial name
- NCT02023086
- Testing
- Contrast sensitivity measurement, Slit Lamp assessment and intra-ocular pressure measurement, Visual field testing
- Where
- Canada
- Volunteers
- 8 people, healthy volunteers welcome
- Sponsor
- Université de Montréal
Healthy
Regulation of Optic Nerve Head Blood Flow During Combined Changes in Intraocular Pressure and Arterial Blood Pressure
Autoregulation is the ability of a vascular bed to maintain blood flow despite changes in perfusion pressure. The existence of an effective autoregulation in the optic nerve head (ONH) circulation has been shown in animals and…
- Trial name
- NCT00914992
- Testing
- Suction cup application, Squatting
- Where
- Austria
- Volunteers
- healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Glaucoma
Spectralis OCT Repeatability and Reproducibility Study
This single-center, prospective, interventional clinical study is conducted to evaluate the repeatability and reproducibility of structural parameters of the optic nerve head, the peripapillary retinal nerve fiber layer, and the…
- Trial name
- S-2013-1 (NCT02209077)
- Testing
- OCT performed to collect data from the back of the eye
- Where
- Canada
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- Heidelberg Engineering GmbH
Optic Disc Swelling
Antiacne Medications Pseudotumor Cerebri
The exact incidence of optic disc swelling and idiopathic intracranial hypertension in patients using antiacne medication is not known so far.
- Trial name
- AAMPTC (NCT02149615)
- Testing
- Retinal nerve fibre layer measurement
- Where
- Switzerland
- Volunteers
- 310 people, healthy volunteers welcome
- Sponsor
- University of Zurich
Normal Healthy Subjects With No Known Ocular Diseases, Glaucomatous Eyes
Clinical Study of the Optic Disc Parameters
Assess the repeatability and agreement of the Optic Disc Parameters, Retinal Nerve Fiber Layer (RNFL) Thickness, and Full Retinal Thickness between the Maestro and iVue OCT devices
- Conditions
- Normal Healthy Subjects With No Known Ocular Diseases, Glaucomatous Eyes, Eyes With Retinal Diseases
- Trial name
- NCT02277119
- Testing
- Maestro, iVue
- Where
- 2 sites in United States
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- Topcon Medical Systems, Inc.
Healthy
Role of Endothelin-1 in Optic Nerve Head Blood Flow Regulation During Isometric Exercise in Healthy Humans
Autoregulation is defined as the ability of a vascular bed to adapt its vascular resistance to changes in perfusion pressure. In the eye, several studies have reported that retinal blood flow is autoregulated over a wide range of…
- Trial name
- NCT00915070
- Testing
- BQ-123, Physiological saline solution, Laser Doppler Flowmetry
- Where
- Austria
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Open Angle Glaucoma
Does the Optic Disc Grading Done Visually by Your Doctor Agree With Optic Nerve Testing Which is Done by Machines?
The purpose of this study is to determine how well the DDLS (Disc Damage Likelihood Scale) (which is a method used by the eye doctor to evaluate how healthy the optic nerve is) measures up to the standard glaucoma tests: OCT…
- Trial name
- NCT00430287
- Where
- United States
- Volunteers
- 101 people, healthy volunteers welcome
- Sponsor
- Wills Eye
Posterior Vitreous Detachment, Vitreomacular Traction
Vitreopapillary Interface and Optic Disc Morphology
The vitreous fills the posterior chamber of the eye and is firmly attached, at the posterior pole, to the macula and the optic nerve head (ONH).
- Conditions
- Posterior Vitreous Detachment, Vitreomacular Traction, Glaucoma, Vitreopapillary Traction
- Trial name
- NCT02290795
- Testing
- OCT imaging/HRT imaging
- Where
- Belgium
- Volunteers
- 350 people, healthy volunteers welcome
- Sponsor
- Universitaire Ziekenhuizen KU Leuven
Healthy
Optical Coherence Tomography (OCT) Normative Data Collection Study
This study is being initiated to create a normal database including measures of optic nerve head (ONH), peripapillary retinal nerve fiber layer (RNFL), and macula using the Heidelberg Spectralis OCT device.
- Trial name
- S-2013-3 (NCT02014688)
- Where
- United States
- Volunteers
- 166 people, healthy volunteers welcome
- Sponsor
- Heidelberg Engineering GmbH
Glaucoma, Myopia
Corrected Measurement of the Retinal Nerve Fiber Layer Thickness by Optic Disc Configuration With the Cirrus HD OCT
Because the measurement of the retinal nerve fiber layer thickness is very sensitive to the position of measurement, it may be incorrect in patients with the tilted disc.
- Trial name
- NCT00741130
- Where
- South Korea
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Yonsei University
Other Disorders of Optic Disc, Bilateral
Video Diversion During Fundoscopic Exam in Children
Fundoscopy is an important aspect of the neurological examination, but can be challenging in uncooperative children. This study explored whether viewing a video (selected by patient or caregiver) during eye examination improves…
- Trial name
- CAFE (NCT01673815)
- Testing
- Video (played on a computer monitor)
- Where
- Canada
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of British Columbia
Glaucoma, Open-Angle
Optic Nerve Head Strain as Biomarker for Glaucoma
The investigators will test the hypothesis that images of the optic nerve head taken a 2 different eye pressures will yield strain estimates that are predictive of the course of glaucoma.
- Trial name
- NCT06240312
- Testing
- Images of eye at 2 eye pressures
- Where
- United States
- Volunteers
- 130 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins University
Glaucoma
Comparison Between an Electronic Mobile Device and Optical Coherence Tomography to Determine Cup-to-disc Ratio
This study was a non-inferiority trial with masked data analysis. Individuals ranging from 18 to 60 years from both genders that met the pre-defined criteria were included.
- Trial name
- NCT02988752
- Testing
- Electronic Mobile Device, Optical Coherence Tomography
- Where
- Brazil
- Volunteers
- 110 people, healthy volunteers welcome
- Sponsor
- Clinica Oftamologica Zona Sul
Glaucoma, Open-Angle
Choroidal Thickness and Its Correlations With Ocular Parameters in Primary Open-angle Glaucoma
Glaucoma is one of the leading causes of blindness worldwide that is a chronic public health problem. Unfortunately, glaucoma can be diagnosed when the disease reaches a certain level in today's conditions.
- Trial name
- NCT03966560
- Testing
- Brimonidine Tartrate, Dorzolamide (as Dorzolamide Hydrochloride) 20 Mg/mL and Timolol (as Timolol Maleate) 5 Mg/mL Eye Drops, Brinzolamide/Timolol 10 MG/1 ML-5 MG/1 ML Ophthalmic Suspension
- Volunteers
- 96 people, healthy volunteers welcome
- Sponsor
- Afyon Kocatepe University Hospital
Optic Disc Edema, Endothelial Dysfunction
B-Complex: A Nutraceutical SANS Countermeasure
In this project, the investigators propose to test effectiveness of a daily nutraceutical supplement containing bioactive B vitamins to mitigate optic disc edema in astronauts.
- Trial name
- NCT05366933
- Testing
- Vitamin B-Complex Supplement
- Where
- United States
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- National Aeronautics and Space Administration (NASA)
Glaucoma, Suspect, Optic Nerve Hypoplasia and Abnormalities of the Central Nervous System
A More Engaging Visual Field Test to Increase Use and Reliability in Pediatrics
The majority of young children do not think that visual field (VF) testing of peripheral vision is similar to a game; therefore, it is not surprising that they have difficulty maintaining attention during VF testing and thus the…
- Conditions
- Glaucoma, Suspect, Optic Nerve Hypoplasia and Abnormalities of the Central Nervous System, Congenital Coloboma of the Optic Nerve, Optic Nerve Head Pits, Bilateral Congenital
- Trial name
- NCT02157025
- Testing
- Cartoon video fixation target and cartoon character voice audio instructions during Humphrey perimetry, Usual Care procedures during Humphrey perimetry for children
- Where
- United States
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Nova Southeastern University
Glaucoma, Suspect, Glaucoma
Validation of an Automatic Analysis Algorithm of the Probability of Glaucoma From Optic Disc Images
Clinical, cross-sectional and prospective study to assess the images of the posterior pole of the retina of patients from the Glaucoma Unit of the IOBA and the Hospital Clínico Universitario de Valladolid during the period…
- Conditions
- Glaucoma, Suspect, Glaucoma, Ocular Hypertension
- Trial name
- NCT04972695
- Testing
- Fundus Photographs (retinographies)
- Where
- Spain
- Volunteers
- 615 people, healthy volunteers welcome
- Sponsor
- Instituto Universitario de Oftalmobiología Aplicada (Institute of Applied Ophthalmobiology) - IOBA
Glaucoma, Primary Open Angle
Caffeine Consumption in Glaucoma Patients and Healthy Subjects
Caffeine is the most widely consumed drinking nutrient in the world. Caffeine effects various organs and the vascular system. It decreases ocular blood flow due to vasoconstriction.
- Trial name
- NCT03675412
- Testing
- Caffeine tablet
- Where
- United States
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Wills Eye