Results 171 to 180 of about 37,029 (205)

The impact of fixation on the multifocal electroretinogram

Documenta Ophthalmologica, 2001
There are a number of variables which can influence the quality of multifocal ERG waveforms. In common with visual field measurements, fixation quality may be an important parameter on the integrity of the acquired data. A low cost, fixation-monitoring device was used to assess fixation quality on a group of normal volunteers.
J A, Chisholm, D, Keating, S, Parks, A L, Evans   +3 more
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The multifocal electroretinogram in retinal detachment

Documenta Ophthalmologica, 1997
We evaluated the retinal electrophysiologic function in both the detached and attached areas of eyes with retinal detachment, and assessed the functional recovery of these areas after surgery by quantifying the results obtained from multifocal electroretinograms.
M, Sasoh, S, Yoshida, M, Kuze, Y, Uji
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Multifocal Electroretinograms in Normal Subjects

Japanese Journal of Ophthalmology, 1998
Multifocal electroretinography (ERG), developed by Sutter in 1992, is a method of recording the spatial distribution of focal ERG in a short time period using multi-input stimulation. Using this technique, we can detect the spatial extent and severity of damage to the macula. In this study, we recorded multifocal ERGs from 20 eyes of 20 normal subjects
A, Nagatomo, N, Nao-i, F, Maruiwa, M, Arai, A, Sawada   +4 more
openaire   +2 more sources

The Effects of Aging on the Multifocal Electroretinogram

Japanese Journal of Ophthalmology, 2001
In order to use multifocal electroretinogram (m-ERG) for clinical assessment, we investigated the effects of aging on waves of the first and second order kernels of the m-ERG.m-ERGs were recorded from 93 eyes (refractive error 0-(-)3.0 D) of 56 normal subjects (range 12-79, mean 44.2 +/- 20.7 years of age) using the Visual Evoked Response Imaging ...
openaire   +3 more sources

Multifocal Electroretinogram in Central Serous Chorioretinopathy

Japanese Journal of Ophthalmology, 2000
Purpose: An assessment of retinal function topographically in the affected eyes with central serous chorioretinopathy (CSC).Participants and Method: We recorded multifocal electroretimogram (mERG) in 5 patients with unilateral CSC, and analyzed the topographical properties in the central visual field (rings #1 + 2).Results: mERG amplitudes in the CSC ...
, Suzuki, , Hasegawa, , Usui, , Ichibe, , Takada, , Takagi, , Abe   +6 more
openaire   +2 more sources

The effects of fundus photography on the multifocal electroretinogram

Documenta Ophthalmologica, 2016
To determine the effect of flash fundus photography (FFP) on the multifocal electroretinogram (mfERG).Ten subjects underwent mfERG testing on three separate dates. Subjects received either mfERG without FFP, mfERG at 5 and 15 min after FFP, or mfERG at 30 and 45 min after FFP on each date. The FFP groups received 10 fundus photographs followed by mfERG
Sandip, Suresh, Brian J, Tienor, Scott D, Smith, Michael S, Lee   +3 more
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The s-Wave of the Multifocal Electroretinogram in Cats

Japanese Journal of Ophthalmology, 2006
To characterize the s-wave of the multifocal electroretinogram (mfERG) in cats, and to determine the contribution of the inner retina to the s-wave by examining the effects of tetrodotoxin (TTX) and N-methyl D: -aspartate (NMDA) injected into the vitreous cavity.mfERGs were recorded from 15 eyes of 15 male cats under general anesthesia.
Hiroyuki, Miyamoto, Yutaka, Tazawa, Akira, Hayasaka, Junfuku, Nitta, Isao, Egawa, Daijiro, Kurosaka   +5 more
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Aging-related changes in the multifocal electroretinogram

Journal of the Optical Society of America A, 2002
The multifocal electroretinogram (MERG) was recorded in the central 36 degrees-diameter field in 26 young (19-30 yr) and 20 old (60-74 yr) adults in normal retinal health according to a fundus grading scale. The mean amplitude densities of the first-order and second-order responses in this retinal region were lower for old adults compared with young ...
Gregory R, Jackson, JulioDeLeon, Ortega, Christopher, Girkin, Carol E, Rosenstiel, Cynthia, Owsley   +4 more
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The effects of pupil size on the multifocal electroretinogram

Documenta Ophthalmologica, 2004
This is an investigation of the effect of changing the pupil diameter on the P1 amplitude and latency of the multifocal electroretinogram (mfERG). MfERGs were recorded using a custom built wide field electrophysiological system. An array of 61 empirically scaled hexagons was used to stimulate the visual field.
P, Gonzalez, S, Parks, F, Dolan, D, Keating   +3 more
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Effects of refractive blur on the multifocal electroretinogram

Documenta Ophthalmologica, 1999
A significant difference in the response density of the MF-ERG response has been suggested for every 2 diopter change of refraction. The influence of refractive blur on the MF-ERG was studied in 8 healthy volunteers using either the VERISTM system (Group A: n=5) or Retiscan(TM) (Group B: n=3).
A M, Palmowski, T, Berninger, R, Allgayer, H, Andrielis, B, Heinemann-Vernaleken, G, Rudolph   +5 more
openaire   +2 more sources