A5023518719- Visual perception and processing mechanisms
- Retinal Development and Disorders
- Neural dynamics and brain function
- Ophthalmology and Visual Impairment Studies
- Glaucoma and retinal disorders
- Retinal Diseases and Treatments
- Ocular and Laser Science Research
- Photoreceptor and optogenetics research
- EEG and Brain-Computer Interfaces
- Neuroscience and Neural Engineering
- Retinal Imaging and Analysis
- Psychosomatic Disorders and Their Treatments
- Tactile and Sensory Interactions
- Neural and Behavioral Psychology Studies
- Multisensory perception and integration
- Retinal and Optic Conditions
- Vestibular and auditory disorders
- Advanced Vision and Imaging
- Mental Health and Psychiatry
- Musculoskeletal pain and rehabilitation
- Neuroscience and Neuropharmacology Research
- Pain Management and Opioid Use
- Corneal surgery and disorders
- Fibromyalgia and Chronic Fatigue Syndrome Research
- Ophthalmology and Eye Disorders
University Medical Center of the Johannes Gutenberg University Mainz
2025
Johannes Gutenberg University Mainz
2025
University of Freiburg
2015-2024
University Medical Center Freiburg
2015-2024
ORCID
2024
University Hospital Leipzig
2012-2021
University of Passau
2021
Toronto Metropolitan University
2018-2021
Institute for Work & Health
2021
Faculty (United Kingdom)
2020
The Freiburg Visual Acuity test is an automated procedure for self-administered measurement of visual acuity. Landolt-Cs are presented on a monitor in one eight orientations. subject presses buttons, which spatially arranged response box according to the possible positions Landolt-Cs' gap. To estimate acuity threshold, best PEST (best Parameter Estimation by Sequential Testing) used psychometric function having constant slope logarithmic scale assumed. Measurement terminates after fixed...
The visual acuity (VA) of patients with very low vision is classified using the semiquantitative scale "counting fingers" (CF), "hand motion" (HM), "light perception" (LP), and "no light perception." More quantitative measures would be desirable, especially for clinical studies. results VA measurements, Early Treatment Diabetic Retinopathy Study (ETDRS) charts, Freiburg Visual Acuity Test (FrACT) were compared. FrACT a computerized test that can present large Landolt C optotypes when...
To investigate whether visual disability which is known to accumulate by poor recovery from optic neuritis (ON) attacks can be lessened early treatment, we investigated the time symptom onset high-dose IV methylprednisolone (IVMP) affected recovery.A retrospective study was performed in a consecutive cohort of patients following their first aquaporin-4 (AQP4)-IgG or myelin oligodendrocyte glycoprotein (MOG)-IgG-ON. Best-corrected acuity (BCVA) ON eyes at 3 months (BCVA3mo) correlated with...
Abstract The multifocal electroretinogram (mfERG) is an electrophysiological test that allows the function of multiple discrete areas retina to be tested simultaneously. This document, from International Society for Clinical Electrophysiology Vision (ISCEV), presents updated and revised ISCEV standard clinical mfERG defines minimum protocols basic recording reporting so responses can recognized compared different laboratories worldwide. major changes with previous relate length m-sequences...
Abstract The pattern electroretinogram (PERG) is a localized retinal response evoked by contrast-reversing pattern, usually black and white checkerboard, which provides information about macular ganglion cell function. This document, from the International Society for Clinical Electrophysiology of Vision (ISCEV; www.iscev.org ) presents an updated revised Standard clinical PERG testing. replaces 2013 all earlier versions. Minimum protocols basic stimuli, recording methods reporting are...
The clinical multifocal electroretinogram (mfERG) is an electrophysiological test of local retinal function. With this technique, many ERG responses, typically 61 or 103, are recorded from the cone-driven retina under light-adapted conditions. This document specifies guidelines for performance test. It also provides detailed guidance on technical and practical issues, as well reporting results. main objective to promote consistent quality mfERG testing within among centers. These 2007...
The Clinical Electro-oculogram (EOG) is an electrophysiological test of function the outer retina and retinal pigment epithelium (RPE) in which change electrical potential between cornea ocular fundus recorded during successive periods dark light adaptation. This document sets out a Standard Method for performance test, also gives detailed guidance on technical practical issues, reporting results. main object to promote consistent quality testing within centres. 2006 Standard, from...
During observation of ambiguous figures our perception reverses spontaneously although the visual information stays unchanged. Research on this phenomenon so far suffered from difficulty to determine instant endogenous reversals with sufficient temporal precision. A novel experimental paradigm discontinuous stimulus presentation improved previous estimates reversal event by a factor three. It revealed that disambiguation takes roughly 50 ms or two loops recurrent neural activity. Further,...
The clinical electro-oculogram (EOG) is an electrophysiological test of the outer retina and retinal pigment epithelium (RPE) in which changes electrical potential across RPE are recorded during successive periods dark light adaptation. This document presents 2017 EOG Standard from International Society for Clinical Electrophysiology Vision (ISCEV: www.iscev.org ). standard has been reorganized updated to include explanation mechanism EOG, but without substantive testing protocol previous...
Photopic negative response (PhNR) and pattern electroretinogram (PERG) are electrophysiological markers of retinal ganglion cell function; both reduced in glaucoma. We compared PhNR PERG different stages the disease.Eleven eyes with preperimetric glaucoma (glaucomatous optic disc normal field); 18 manifest glaucoma; 26 normals were included. obtained (flash strength from 0.1-4 cd·s/m(2)) steady-state analyzed amplitude (baseline to 72 ms trough); PhNR/b-wave ratio; amplitude; ratio...