Pattern reversal electroretinogram (PRERG) abnormalities in ocular hypertension: correlation with glaucoma risk factors
作者:
TrickGary L.,
BicklerMichelle,
CooperDorothy G.,
KolkerAllan E.,
NesherRonit,
期刊:
Current Eye Research
(Taylor Available online 1988)
卷期:
Volume 7,
issue 2
页码: 201-206
ISSN:0271-3683
年代: 1988
DOI:10.3109/02713688808995749
出版商: Taylor&Francis
数据来源: Taylor
摘要:
The indices employed commonly for the diagnosis of glaucoma (tonometry, ophthalmoscopy and perimetry) do not always identify which patients with ocular hypertension (OHT) will develop primary open-angle glaucoma (POAG) before irreversible visual field loss is manifest (1). The human pattern reversal electroretinogram (PRERG) is a bioelectric response reflecting neural activity of the proximal retina. PRERG amplitude reductions have been observed in POAG and other diseases affecting the optic nerve and retinal ganglion cells. This study was designed to determine whether OHT patients exhibit PRERG amplitude reductions and whether PRERG results are correlated with routinely evaluated clinical parameters. Steady-state PRERG (16 rps) were elicited by high contrast (76%), phase alternating checkerboard patterns (15–20 min checks) from one eye of 130 patients with ocular hypertension and 47 age matched visual normals (AMVNs). A significant (p<0.05) reduction in PRERG amplitude was noted for the OHT patients and 11.5% of those patients exhibited PRERG amplitudes more than 2.0 standard deviations below the AMVN mean. PRERG amplitude was found to be positively correlated with diastolic blood pressure (DBP) and negatively correlated with age, but no correlation between PRERG amplitude and either IOP, C/D ratio, or systolic blood pressure was evident. The lack of correlation between PRERG amplitude and the commonly used clinical indices may suggest a complementary role for this neurophysiologic test in determining which OHT patients will develop glaucoma.
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