Results 21 to 30 of about 2,391 (172)

The Cellular Origins of Chick Global Flash Multifocal Electroretinogram

i-Perception, 2011
Purpose: The aim of this study was to obtain a better understanding of the cellular contributions to the chick global flash mfERG by using a pharmacological dissection method. Method: Global flash mfERGs were recorded from 11 white leghorn chicks (Gallus
Patrick W. K. Ting, Patrick H. W. Chu, Yf Ng, Henry H. L. Chan   +3 more
doaj   +2 more sources

Optically Induced Peripheral Contrast Reduction Restores ON/OFF Pathway Balance in Myopic Eyes [PDF]

Ophthalmology Science
Purpose: The aim of this study was to investigate ON/OFF pathway responses and the impact of contrast reduction in myopes and emmetropes. Design: This was a cross-sectional study.
Zhiqiang Ye, MD, Yifan Luo, MD, Muhan Zhong, MSc, Zaifeng Cui, PhD, Huayu Zhang, MSc, Xindan Chang, MSc, Xue Li, PhD, Yingying Huang, MD, Hao Chen, MD, OD, Jinhua Bao, PhD   +9 more
doaj   +2 more sources

Middle-Inner Macular Layers Dysfunction in a Case of Stellate Foveomacular Retinoschisis Detected by Abnormal Multifocal Photopic Negative Response Recordings

Diagnostics, 2022
We describe the macular morpho-functional assessment of a 65-year-old man affected by stellate nonhereditary idiopathic foveomacular retinoschisis (SNIFR), studied by visual field, SD-OCT, autofluorescence, full-field electroretinogram (ffERG ...
Lucilla Barbano, Giulio Antonelli, Mariacristina Parravano, Eliana Costanzo, Vincenzo Parisi, Lucia Ziccardi   +5 more
doaj   +1 more source

The multifocal pattern electroretinogram in glaucoma [PDF]

Vision Research, 2004
The pattern ERG can be used to detect early glaucomatous change, because the response of cells in the inner retina from (typically) 20 degrees -40 degrees of area is reduced before perimetric abnormality is certain. The multifocal pattern electroretinogram (mfPERG) allows analysis of many local regions within this area.
Stiefelmeyer, Sandra, Neubauer, Aljoscha S., Berninger, Thomas, Arden, Geoffrey B., Rudolph, Günther   +4 more
openaire   +5 more sources

Electrophysiological findings of Bardet–Biedl syndrome: a case series

Journal of the Egyptian Ophthalmological Society, 2020
Background Bardet–Biedl syndrome (BBS) is a very rare autosomal recessive genetic disease with multiple manifestations including the ocular system. Aim This study presents different electrophysiological and clinical findings in three female patients with
Marwa A Tabl
doaj   +1 more source

Use of Visual Electrophysiology to Monitor Retinal and Optic Nerve Toxicity

Biomolecules, 2022
It is important for clinicians to consider exposure to toxic substances and nutritional deficiencies when diagnosing and managing cases of vision loss.
Tsun-Kang Chiang, Kayla Marie White, Shree K. Kurup, Minzhong Yu   +3 more
doaj   +1 more source

Multifocal electroretinogram changes in patients with retinal vein occlusion

Delta Journal of Ophthalmology, 2020
Background Retinal vein occlusion (RVO) is one of the most common vascular retinal disorders that lead to macular edema. There is often discrepancy between visual prognosis and optical coherence tomography (OCT) changes.
Heba M Shafik, Amin E Nawar
doaj   +1 more source

Multifocal Electroretinograms [PDF]

Journal of Visualized Experiments, 2011
A limitation of traditional full-field electroretinograms (ERG) for the diagnosis of retinopathy is lack of sensitivity. Generally, ERG results are normal unless more than approximately 20% of the retina is affected. In practical terms, a patient might be legally blind as a result of macular degeneration or other scotomas and still appear normal ...
openaire   +2 more sources

Relationship between optical coherence tomography and electrophysiology of the visual pathway in non-optic neuritis eyes of multiple sclerosis patients. [PDF]

PLoS ONE, 2014
PURPOSE: Loss of retinal ganglion cells in in non-optic neuritis eyes of Multiple Sclerosis patients (MS-NON) has recently been demonstrated. However, the pathological basis of this loss at present is not clear.
Prema Sriram, Chenyu Wang, Con Yiannikas, Raymond Garrick, Michael Barnett, John Parratt, Stuart L Graham, Hemamalini Arvind, Alexander Klistorner   +8 more
doaj   +1 more source

Rare occult macular dystrophy with a pathogenic variant in the RP1L1 gene in a patient of Swiss descent

American Journal of Ophthalmology Case Reports, 2022
Purpose: We report a first case of bilateral occult macular dystrophy (OMD) with a c.133C>T (p.Arg45Trp) pathogenic variant in the retinitis pigmentosa 1-like 1 (RP1L1) gene in a patient of Caucasian Swiss decent.
Olga Zabek, Ioannis Lamprakis, Annekatrin Rickmann, Giacomo Calzetti, Bence György, Hendrik P.N. Scholl, Maria della Volpe Waizel   +6 more
doaj   +1 more source