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 comp
Pattern electroretinograms in ocular hypertension
β Scribed by G. Ambrosio; G. Arienzo; P. Aurilia; A. Colasanti; R. Fusco
- Publisher
- Springer-Verlag
- Year
- 1988
- Tongue
- English
- Weight
- 180 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0012-4486
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β¦ Synopsis
The authors recorded pattern electroretinograms at different spatial frequencies in 16 patients affected with ocular hypertension. In 12 of these subjects the electroretinograms dropped in amplitude around 2 cycles/degree. The authors attributed this finding to ocular hypertension, hypothesizing ischernic damage at the head of the optic nerve with consequent fiber atrophy and degeneration of ganglion cells.
π SIMILAR VOLUMES
We recorded the pattern electroretinogram (PERG) to small (0.8 ~ and very large (15 ~ check sizes in normal subjects, in patients with early-stage glaucoma, and in patients with ocular hypertension. In glaucoma, the PERG amplitude was reduced. This reduction was more prominent for a check size of 0.
Diagnostic value of transient pattern electroretinogram (PERG), recorded by skin electrodes, was compared with Goldmann perimetry in cases of ocular hypertension and glaucoma. According to the assumption that the PERG mostly reflects activity of the retinal glanglion cells, and histological evidence
To determine whether long-term reduction of intraocular pressure leads to a corresponding preservation of the pattern electroretinogram (PERG), PERGs were studied in 21 patients with ocular hypertension who had received unilateral timolol therapy for a minimum of 6 years. The mean difference in intr
Electroretinograms (ERGs) were obtained from pigmented and albino rats to step luminance changes of an unpatterned TV screen. Surround luminance was increased until the ERG became small and focal. In pigmented rats the ERG at on was positive, earlier, and about twice the amplitude of the negative ER