منابع مشابه
The multifocal pattern electroretinogram in glaucoma
BACKGROUND 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. The aim of this study was to investigate whether in patients wit...
متن کاملUpdate on the pattern electroretinogram in glaucoma.
PURPOSE To review the efficacy of the pattern electroretinogram (PERG) in early diagnosis of glaucoma. METHODS Stimulation parameters of check size and temporal frequency are considered. Analyses of various peaks (P50, N95, the N95/P50) and Fourier steady-state are considered. The relation to visual field defects is explored. RESULTS The PERG is markedly alterated in glaucoma. It shows ampl...
متن کاملPhotopic negative response versus pattern electroretinogram in early glaucoma.
PURPOSE Photopic negative response (PhNR) and pattern electroretinogram (PERG) are electrophysiological markers of retinal ganglion cell function; both are reduced in glaucoma. We compared PhNR and PERG in different stages of the disease. METHODS Eleven eyes with preperimetric glaucoma (glaucomatous optic disc with normal field); 18 with manifest glaucoma; and 26 normals were included. We obt...
متن کاملA spatial frequency-doubling illusion-based pattern electroretinogram for glaucoma.
PURPOSE A pattern electroretinogram (PERG) in which stimuli displaying the frequency-doubling (FD) illusion are presented simultaneously to multiple parts of the visual field was evaluated for its ability to diagnose glaucoma. This multiregion FD PERG is referred to in the current study as the MFP. METHODS The nine stimulus regions were temporally modulated at incommensurate frequencies typic...
متن کاملPattern electroretinogram in multiple sclerosis.
The pattern electroretinogram obtained in patients affected by multiple sclerosis were compared with those in a normal population. The pattern electroretinogram amplitude in multiple sclerosis optic neuritis frequently appeared normal, but pattern electroretinogram amplitude abnormalities were found in patients suffering from recurrent multiple sclerosis optic neuritis. Pattern electroretinogra...
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ژورنال
عنوان ژورنال: Current Opinion in Ophthalmology
سال: 2006
ISSN: 1040-8738
DOI: 10.1097/01.icu.0000193082.44938.3c