Purpose: To evaluate electrically evoked phosphene thresholds (EPTs) in healthy subjects and in patients with retinal disease and to assess repeatability and possible correlations with common ophthalmologic tests.
Methods: In all, 117 individuals participated: healthy subjects (n = 20) and patients with retinitis pigmentosa (RP, n = 30), Stargardt's disease (STG, n = 14), retinal artery occlusion (RAO, n = 20), nonarteritic anterior ischemic optic neuropathy (NAION, n = 16), and primary open-angle glaucoma (POAG, n = 17). EPTs were determined at 3, 6, 9, 20, 40, 60, and 80 Hz with 5 + 5-ms biphasic current pulses using DTL electrodes. Subjects were examined twice (test-retest range: 1-6 weeks). An empirical model was developed to describe the current-frequency relationship of EPTs. Visual acuity, visual field (kinetic + static), electrophysiology (RP, RAO, STG: Ganzfeld-electroretinography [ERG]/multifocal-ERG; POAG: pattern-ERG; NAION: VEP), slit-lamp biomicroscopy, fundus examination, and tonometry were assessed.
Results: EPTS varied between disease groups (20 HZ: healthy subjects: 0.062 ± 0.038 mA; STG: 0.102 ± 0.097 mA; POAG: 0.127 ± 0.09 mA; NAION: 0.244 ± 0.126 mA; RP: 0.371 ± 0.223 mA; RAO: 0.988 ± 1.142 mA). In all groups EPTs were lowest at 20 Hz. In patients with retinal diseases and across all frequencies EPTs were significantly higher than those in healthy subjects, except in STG at 20 Hz (P = 0.09) and 40 Hz (P = 0.17). Test-retest difference at 20 Hz was 0.006 mA in the healthy group and 0.003-0.04 mA in disease groups.
Conclusions: Considering the fast, safe, and reliable practicability of EPT testing, this test might be used more often under clinical circumstances. Determination of EPTs could be potentially useful in elucidation of the progress of ophthalmologic diseases, either in addition to standard clinical assessment or under conditions in which these standard tests cannot be used meaningfully. (ClinicalTrials.gov number, NCT00804102.).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1167/iovs.12-9612 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Vδ2 T-cells response in people with Mpox infection: a three-month longitudinal assessment.
Emerg Microbes Infect
January 2025
HIV/AIDS Unit, National Institute for Infectious Diseases "Lazzaro Spallanzani" IRCCS, Rome, Italy.
The first evidence that Orthopoxvirus induced the expansion and the recall of effector innate Vδ2T-cells was described in a macaque model. Although, an engagement of αβ T-cells specific response in patients infected with human monkeypox (Mpox) was demonstrated, little is known about the role of γδ T-cells during Mpox infection. IFN-γ-producing γδ T-cells in the resistance to poxviruses may a key role in inducing a protective type 1 memory immunity.
View Article and Find Full Text PDFModulation of Affective and Sensory Qualities of Acute Nociceptive Pain by Curcuma longa and Boswellia serrata Extract Formulation: A Randomized, Double-Blind, Placebo-Controlled Design in Subjects With Exercise-Induced Acute Musculoskeletal Pain.
Cureus
January 2025
Orthopedics, Nirmal Hospital, Jhansi, IND.
Introduction Excessive repetitive physical activity most often leads to acute musculoskeletal pain. The management of acute pain is one of the primary concerns. The nociceptive pain has both sensory and affective qualities, patterns, and intensity.
View Article and Find Full Text PDFNuclear Alpha-Synuclein in Parkinson's Disease and the Malignant Transformation in Melanoma.
Neurol Res Int
January 2025
Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosi, Mexico.
Alpha-synuclein (ASyn), a marker of Parkinson's disease (PD) and other neurodegenerative processes, plays pivotal roles in neuronal nuclei and synapses. ASyn and its phosphorylated form at Serine 129 (p-ASyn) are involved in DNA protection and repair, processes altered in aging, neurodegeneration, and cancer. To analyze the localization of p-ASyn in skin biopsies of PD patients and melanoma.
View Article and Find Full Text PDFAn immersive virtual reality exergame as a patient education approach in fibromyalgia: Pilot study.
Digit Health
January 2025
Division of Rheumatology, Department of Medicine (DMED), ASUFC, University of Udine, Udine, Italy.
Background: Immersive Virtual Reality (VR) has been applied in pain management for various conditions, but its use in fibromyalgia (FM) remains underexplored. While physical activity plays a role in treating FM, patients' low tolerance often limits its effectiveness. After reviewing the literature on VR and games for FM, we designed a novel VR exergame to assist FM patients in performing physical activity, and evaluate its feasibility.
View Article and Find Full Text PDFEvaluation of Quality of Life and Psychosocial Status in Children with Inflammatory Bowel Disease.
Sisli Etfal Hastan Tip Bul
December 2024
Division of Pediatric Gastroenterology, Department of Pediatrics, University of Health Sciences Türkiye, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Türkiye.
Objectives: Inflammatory bowel disease (IBD) in children is a chronic condition that affects the psychosocial status and physical activities of children and their parents. This study aimed to investigate the impact of IBD on the quality of life of adolescents and their families and the variability of behavioral and emotional adjustment issues compared to a healthy control group.
Methods: This study was designed as a prospective controlled study.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!