Pattern electroretinogram abnormality and glaucoma
نویسندگان
چکیده
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 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 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 کاملPattern electroretinogram and automated perimetry in patients with glaucoma and ocular hypertension.
To determine whether the pattern electroretinogram can improve the objectivity of visual field assessment, 39 patients with glaucoma and ocular hypertension were studied. This was to establish whether there is a correlation between the pattern electroretinogram and the global indices (mean deviation and corrected pattern standard deviation) provided by automated perimetry using the Humphrey vis...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ophthalmology
سال: 2005
ISSN: 0161-6420
DOI: 10.1016/j.ophtha.2004.07.018