Results 111 to 120 of about 6,792 (131)

A Method for Recording A Pattern Electroretinogram of the Macula

American Journal of Ophthalmology, 1981
This paper describes the construction and use of a gold foil electrode for pattern electroretinography. The electrode, a multilaminated structure of Mylar (polyethylene terephthalate) cassette splicing tabs, gold foil and a single 38-gauge strand of wire, is comfortable for 20 minutes with one drop of anesthetic and can be used at least 20 times.
D J, Galbraith, J A, Parker
openaire   +2 more sources

Improving the reliability of pattern electroretinogram recording

Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1992
The pattern electroretinogram (PERG) is a small electrical response of the retina to a reversing checkerboard pattern, usually less than 6 microV in amplitude. Unfortunately, the PERG can be obscured by artifacts such as blinks, eye movements, poor fixation, and amplifier saturation.
J, Froehlich, D I, Kaufman
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A review of the clinical applications of the pattern electroretinogram

Ophthalmic and Physiological Optics, 1989
The pattern electroretinogram (PERG) has recently been introduced as a clinical procedure. It has been thought by many to represent activity of the retinal ganglion cells, although this is still a matter of contention. The exciting prospect of a selective test of ganglion cell function led to the application of the PERG in a variety of ophthalmological
B M, Hull, D A, Thompson
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The Pattern Electroretinogram in Optic Nerve Disease

Ophthalmology, 1983
Pattern evoked electroretinograms (PERG), diffuse flash electroretinograms (ERG) and visual evoked potentials were studied in patients with unilateral optic nerve disease. Patients with Snellen acuities of less than 6/30 did not have recordable PERGs in their affected eye, whereas their diffuse flash ERGs were normal.
W, Seiple, M J, Price, M, Kupersmith, I M, Siegel, R E, Carr   +4 more
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Pattern electroretinogram and macular perfusion in glaucoma

Vestnik oftal'mologii, 2018
To study microcirculatory and functional changes in macula in patients with Primary Open-Angle Glaucoma (POAG).The study included 95 POAG patients and 42 healthy control subjects. Whole en face image vessel density (wiVDRetina) was measured both in fovea and in parafovea using OCT-angiography (OCT-A) by means of SD-OCT AngioVue on Avanti RtVue xR ...
N I, Kurysheva, E V, Maslova, A V, Trubilina, A V, Fomin, M B, Lagutin   +4 more
openaire   +2 more sources

Pattern-reversal electroretinograms in ocular hypertension

Documenta Ophthalmologica, 1985
Pattern-reversal electroretinograms (ERGs) were recorded from seven patients, aged 50 to 69 years, with clinical diagnosis of unilateral ocular hypertension. In four of the seven patients the pattern ERG amplitude from the hypertensive eye was reduced below the normal level of variability, when compared with the amplitude from the opposite normotensive
P, Wanger, H E, Persson
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Comparison of the uniform-field electroretinogram and the pattern electroretinogram to checkerboard and bar gratings

Documenta Ophthalmologica, 2019
To compare the electroretinal response associated with the uniform-field electroretinogram (UF-ERG) to that of the pattern electroretinogram (PERG) to checkerboard and bar-grating stimuli.UF-ERG and PERG to bars and checkerboard were recorded for 18 visually normal subjects (36 eyes) of mean age 45 years (range 20-75).
Alexander J. Lingley, Ange-Lynca Kantungane, Stuart G. Coupland   +2 more
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Pattern visual evoked potentials and pattern electroretinograms in hypothyroidism

Documenta Ophthalmologica, 1989
This study reports the pattern visual evoked potential (PVEP) findings in 10 patients with idiopathic hypothyroidism. Eight of these patients also had pattern electroretinography (PERG) performed and six were additionally seen after treatment with thyroxine. Only one patient had definitely abnormal PVEPs at the time of initial recording.
G E, Holder, J R, Condon
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Computation of the luminance and pattern components of the bar pattern electroretinogram

Documenta Ophthalmologica, 1987
Pattern onset electroretinograms (PERGs) were recorded from four normal subjects. Square-wave gratings of 75% contrast were presented in three approximately contiguous, concentric zones of outer angular radius, 5.1 degrees, 12.6 degrees, and 23.6 degrees. The zones were calculated to give equal numbers of ganglion cell receptive fields.
D A, Thompson, N, Drasdo
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Check-size specific changes of pattern electroretinogram in patients with early open-angle glaucoma

Documenta Ophthalmologica, 1988
Michael Bach, Bach Michael
exaly