Results 161 to 170 of about 37,029 (205)

Voluntary suppression of the multifocal electroretinogram

Ophthalmology, 2004
To describe multifocal electroretinogram (mfERG) responses in 2 patients with nonorganic visual loss and in 11 eyes of 6 healthy persons who suppressed their mfERG responses.Observational case series.The mfERG results were recorded in all individuals using the Veris Science 4.2 instrument.
Tamara R, Vrabec, Elizabeth L, Affel, John P, Gaughan, Rod, Foroozan, Matthew T S, Tennant, James M, Klancnik, Christopher S, Jordan, Peter J, Savino   +7 more
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The multifocal electroretinogram in age-related maculopathies

Documenta Ophthalmologica, 2000
To measure and compare the multifocal electroretinogram in control group and patients with age-related maculopathies, 17 eyes of control subjects, 9 eyes of wet-form ARMD, 8 eyes of dry-form ARMD and 14 eyes of idiopathic macular hole were tested with VERIS Sciences 4.0.
Lezheng Wu
exaly   +3 more sources

The effects of forward light scattering on the multifocal electroretinogram

Current Eye Research, 2004
To study the effects of forward light scattering on the multifocal electroretinogram (mfERG).Thirty young normal subjects were recruited for this study. The mfERG was measured under five conditions. (1) no light scattering (stimulus contrast 93%), (2) mild light scattering (stimulus contrast 80%), (3) moderate light scattering (stimulus contrast 50%), (
Tam, Anderson, Chen, Henry, Brown, Brian, Yap, Maurice   +3 more
openaire   +3 more sources

The effect of filter bandwidth on the multifocal electroretinogram

Documenta Ophthalmologica, 1996
The effect of filter bandwith on the multifocal electroretinogram was assessed by means of theoretical calculation, electronic simulation and real multifocal electroretinogram recordings. Waveform distortion by high-pass filtering on simulated square waves, normal electroretinogram waveforms and negative electroretinogram waveforms was demonstrated ...
Tom H. Williamson, S Parks, D Keating
exaly   +3 more sources

Variation of multifocal electroretinogram with axial length

Ophthalmic and Physiological Optics, 2003
Abstract Introduction: The first‐order kernel response of multifocal electroretinogram (mfERG) decreases in myopia. A recent study indicates that the flash ERG is also reduced with increased axial length.
H L, Chan, N, Mohidin
exaly   +3 more sources

Objective functional assessment of age‐related maculopathy: a special application for the multifocal electroretinogram [PDF]

Australasian journal of optometry, The, 2005
This paper gives a brief review of methods that assess objectively function in age-related maculopathy (ARM) with emphasis on a newer method, the multifocal electroretinogram (mfERG).
Jan E Lovie-Kitchin
exaly   +1 more source

The Multifocal Electroretinogram

Journal of Neuro-Ophthalmology, 2003
The multifocal electroretinogram (mfERG) technique allows local ERG responses to be recorded simultaneously from many regions of the retina. As in the case of the full-field ERG, the ganglion cells contribute relatively little to the response, which originates largely from the outer retina.
Donald C, Hood, Jeffrey G, Odel, Candice S, Chen, Bryan J, Winn   +3 more
openaire   +2 more sources

Topography of the multifocal electroretinogram

Documenta Ophthalmologica, 1998
The functional topography of the human retina was characterized using the multifocal electroretinogram (ERG), with particular attention to the form of the decline in response with retinal eccentricity. Population response variability was examined and compared to standard full field ERG variability.
W A, Verdon, G, Haegerstrom-Portnoy
openaire   +2 more sources

Acute effects of sildenafil on the electroretinogram and multifocal electroretinogram

American Journal of Ophthalmology, 2001
To evaluate the acute effects of sildenafil (Viagra; Pfizer, Inc, New York, New York) on the electroretinogram and multifocal electroretinogram.Eighteen healthy individuals (ages 21-49 years) were studied; 14 were given 200 mg sildenafil orally and four were given only water.
J K, Luu, A V, Chappelow, T J, McCulley, M F, Marmor   +3 more
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The multifocal electroretinogram (mfERG) in the pig

Acta Ophthalmologica Scandinavica, 2007
Abstract.Purpose:  To establish a method allowing multifocal electroretinography (mfERG) recording with simultaneous fundus monitoring on anaesthetized pigs. In addition we characterize the peaks of the porcine mfERG trace, and compare the visual streak area with the optic nerve head, a known non‐response area.
Voss Kyhn, Maria, Kiilgaard, Jens Folke, Lopez, Ana Garcia, Scherfig, Erik, Prause, Jan Ulrik, la Cour, Morten   +5 more
openaire   +3 more sources