Objective: To determine the effects of myopia on Visual Evoked Potentials among subjects attending eye OPD. Study design and setting: This was a cross-sectional study with non-probability convenience sampling technique carried out at Department Ophthalmology, Peoples Medical College Hospital Nawabshah / GMMMC Sukkur from March 2021 to November 2021. Methodology: Total sample size derived be 180...

The purpose of our study is to changes in the parameters visual evoked potentials a flash under influence speleotherapy. Material and research methods. involved 23 2nd year students VSMU (18-21 years old, 9 boys 14 girls). course speleotherapy consisted 10 sessions 60 minutes each was carried out stationary ground speleochamber at temperature 18-22 °C. conducted compliance with basic bioethical...

Acetylcholine (ACh) contributes to learning processes by modulating cortical plasticity in terms of intensity of neuronal activity and selectivity properties of cortical neurons. However, it is not known if ACh induces long term effects within the primary visual cortex (V1) that could sustain visual learning mechanisms. In the present study we analyzed visual evoked potentials (VEPs) in V1 of r...

To study components related to parallel processing of information across the visual field, multi-focal pattern reversal visual evoked potentials (VEPs) were recorded using binary m-sequences. Contrast, chromatic, spatial and temporal characteristics of the stimuli were varied in order to favor contributions from either M or P pathways. Responses were decomposed into two additive components whos...

Original Article Pattern reversal Macro adenoma P100 latency Visual evoked Potentials (VEPs) to checkerboard pattern reversal were recorded from a patient with complaints of severe and sudden headache and unexplained unilateral diminution of vision over 2 years. Since the VEP recordings showed markedly delayed response and severely reduced amplitude of P100 wave form from the left eye, a compre...

Sensory functions and their electrophysiological correlates have not been adequately documented during pregnancy. The present study reports visual evoked potential responses to pattern reversal (VEP-P) in ten third trimester pregnant women and changes in latency of NPN complex when compared with these responses in the non pregnant state. Visual evoked potentials were recorded from O1-A1 and O2-...

BACKGROUND In albinism the majority of the nerve fibers of the optic nerve originating from an eye are innervating the contralateral hemisphere. As a result of the predominantly monocular innervation of the left and right hemispheres, the unilateral activation of the visual cortex (lateralization) can be detected with visual evoked potentials (VEP). PATIENTS AND METHODS The VEPs were elicited...

OBJECTIVE To evaluate the changes over two years in the retinal nerve fibre layer (RNFL) of patients with multiple sclerosis (MS). To compare the ability of optical coherence tomography (OCT), scanning laser polarimetry (GDx), visual evoked potentials (VEP) and visual field examination to detect axonal loss in these patients. MATERIAL AND METHODS Fifty eyes of MS patients without episodes or ...

PURPOSE Visual evoked potentials (VEPs) are widely used to objectively assess visual system function in animal models of ophthalmological diseases. Although use of chronically implanted electrodes is common in longitudinal VEP studies using rodent models, reliability of recordings over time has not been assessed. We compared VEPs 1 and 7 days after electrode implantation in the adult mouse. We ...

BACKGROUND AND PURPOSE Our study aims to evaluate retinal function and neural conduction in post-retinal visual pathways of patients with non-arteritic ischaemic optic neuropathy (NION). METHODS Twenty patients (mean age: 63.7 +/- 5.96 year) with NION and 20 age-similar control subjects were enrolled. Simultaneous recording of pattern electroretinograms (PERGs) and visual evoked potentials (V...