scholarly journals The Role of the Flash Visual Evoked Potential in Evaluating Visual Function in Patients with Indirect Traumatic Optic Neuropathy

2021 ◽  
Vol Volume 15 ◽  
pp. 1349-1355
Author(s):  
Mai A Mohammed ◽  
Ehab Mossallam ◽  
Ibrahim Y Allam
Keyword(s):  
Optic Neuropathy ◽  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Traumatic Optic Neuropathy ◽  
Flash Visual Evoked Potential ◽  
Visual Evoked

Efficacy of the visual evoked potential monitoring in endoscopic transnasal transsphenoidal surgery as a real-time visual function

2018 ◽  
Vol 66 (4) ◽  
pp. 1075 ◽  
Author(s):  
Daisuke Wajima ◽  
Fumihiko Nishimura ◽  
Young-Soo Park ◽  
Yasushi Motoyama ◽  
Ichiro Nakagawa ◽  
...  
Keyword(s):  
Real Time ◽  
Visual Function ◽  
Transsphenoidal Surgery ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Evoked Potential Monitoring ◽  
Visual Evoked ◽  
Potential Monitoring

Multifocal visual evoked potential evaluation for diagnosis of acute optic neuritis and for prediction of visual outcome and ganglion cell layer thinning following optic neuritis

2020 ◽  
pp. 135245852097573
Author(s):  
Gorm Pihl-Jensen ◽  
Benedikte Wanscher ◽  
Jette Lautrup Frederiksen
Keyword(s):  
Optic Neuritis ◽  
Ganglion Cell ◽  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Conduction Block ◽  
Visual Outcome ◽  
Multifocal Visual Evoked Potential ◽  
Visual Evoked

Background:: While damage to the optic nerve following optic neuritis (ON) is readily quantifiable, the evaluation of prognosis for visual function and neuroaxonal loss in the acute ON is challenging. Objective:: The objective of this study is to investigate the value of multifocal visual evoked potential (mfVEP) in acute ON, diagnostically for acute ON and prognostically for visual outcome and subsequent ganglion cell/inner plexiform layer thickness (GCLIPLt). Methods:: A prospective cohort study of mfVEP and full-field visual evoked potential (ffVEP) in acute, unilateral ON (onset < 31 days) was conducted. Comparisons with healthy controls ( n = 30) and association analysis with follow-up optical coherence tomography (OCT) measurements (of the GCLIPLt) and visual function (Sloan low-contrast visual acuity (LCVA)) were conducted. Results:: Seventy-nine ON patients were included (mean: 17 days from onset). Excluding measurements with conduction block, ffVEP ( n = 54) and mfVEP ( n = 44) showed sensitivities of 89% and 84% to a specificity of 97%. 65/79 patients were re-examined (mean: 200 days follow-up). mfVEP amplitude and latency inter-eye asymmetry in acute ON correlated with GCLIPLt ( r = 0.587 and Spearman’s ρ = 0.597, for both, p < 0.001). mfVEP amplitude correlated with LCVA inter-eye asymmetry at follow-up ( r = 0.421, p < 0.001), mfVEP latency did not. Conclusion: mfVEP may support the prognostic evaluation of acute ON patients and prove valuable in future neuroprotective and remyelinating trials. In acute ON, the increase in diagnostic value of mfVEP to ffVEP may be limited due to widespread conduction block.

scholarly journals Comparing isolated-check visual evoked potential, pattern visual evoked potential, and standard automated perimetry in dysthyroid optic neuropathy eyes

Eye ◽  
2020 ◽  
Author(s):  
Xin Qi ◽  
Boding Tong ◽  
Weikun Hu ◽  
Ban Luo
Keyword(s):  
Optic Neuropathy ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Mean Deviation ◽  
Automated Perimetry ◽  
Standard Automated Perimetry ◽  
Dysthyroid Optic Neuropathy ◽  
Pattern Visual Evoked Potential ◽  
Diagnostic Capabilities ◽  
Visual Evoked

Abstract Objective To determine the diagnostic ability of isolated-check visual evoked potential (icVEP), pattern visual evoked potential (pVEP), and standard automated perimetry (SAP) between dysthyroid optic neuropathy (DON) and thyroid-associated ophthalmopathy (TAO) without DON (non-DON). Methods This is a case-control study, 49 bilateral patients (26 DON and 23 non-DON) were included. icVEP, pVEP, and SAP were conducted in all the subjects, icVEP parameters compared were signal-to-noise ratios (SNRs) under 8, 16, and 32% depth of modulation (DOM). pVEP parameters compared were amplitude and latency. SAP parameters were mean deviation (MD) and pattern standard deviation (PSD). The area under the receiver operating characteristic (ROC) curve (AUC), net reclassification index (NRI), integrated discrimination index (IDI), and decision curve analysis (DCA) were applied for analysis. Results In icVEP, values of SNR in DON were significantly smaller than non-DON (p < 0.05). In pVEP, P100 latent time in DON was significantly larger than non-DON (p = 0.0026). In SAP, value of PSD in DON was larger than non-DON (p = 0.0006), and value of MD in DON was smaller (p = 0.0007). AUC, NRI, and IDI among the three tests were not significantly different. DCA showed that SNR of icVEP under 8% DOM was the farthest from the two extreme curves. Conclusions icVEP, pVEP, and SAP have equal diagnostic capabilities to discern between DON and non-DON. In addition, icVEP may represent a significant ancillary diagnostic approach to DON detection, with more clinical benefit.

The use of Nd:YAG laser in pituitary surgery and evaluation of visual function by visual evoked potential (VEP)

1992 ◽  
Vol 15 (3) ◽  
pp. 193-197 ◽  
Author(s):  
Hamit Ziya G�kalp ◽  
Nihat Egemen ◽  
Adil �ulcuoglu ◽  
Sait Naderi ◽  
Ahmet Zorlutuna
Keyword(s):  
Nd:Yag Laser ◽  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pituitary Surgery ◽  
Visual Evoked
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