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Oscillatory Potentials

Oscillatory Potentials Abstract To the Editor. —It was with great interest that I read the article by Bresnick and al1 on the predictive values of the oscillatory potentials (OPs) in diabetic retinopathy. I was somewhat disappointed by the great variability (Table 2) of the results obtained. It is my feeling that the observed variability could have been significantly reduced if the authors had made use of a high-pass filter set at 100 cycles per second (cps), rather than the 20 cps used. As mentioned in their article, the frequency components of the electroretinogram are in the 25-cps range for the a and b waves and in the 140-cps range for the OPs. Thus, a low-frequency cutoff set at 20 cps still passes a great deal of both a and b waves, as witnessed in Fig 3. Furthermore, the latter situation makes OP amplitude measurements much more difficult since, as previously acknowledged,2 References 1. Bresnick GH, Korth K, Groo A, et al: Electroretinographic oscillatory potentials predict progression of diabetic retinopathy: Preliminary report . Arch Ophthalmol 1984;102:1307-1311.Crossref 2. Tsuchida Y, Kawasaki K, Fujimura K, et al: Isolation of faster components in the electroretinogram and visually evoked response in man . Am J Ophthalmol 1973;75:846-852. 3. Wachtmeister L, Dowling JE: The oscillatory potentials of the mudpuppy retina . Invest Ophthalmol Vis Sci 1978;17:1176-1188. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Ophthalmology American Medical Association

Oscillatory Potentials

Archives of Ophthalmology , Volume 103 (4) – Apr 1, 1985

Oscillatory Potentials

Abstract

Abstract To the Editor. —It was with great interest that I read the article by Bresnick and al1 on the predictive values of the oscillatory potentials (OPs) in diabetic retinopathy. I was somewhat disappointed by the great variability (Table 2) of the results obtained. It is my feeling that the observed variability could have been significantly reduced if the authors had made use of a high-pass filter set at 100 cycles per second (cps), rather than the 20 cps used. As mentioned in their...
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Publisher
American Medical Association
Copyright
Copyright © 1985 American Medical Association. All Rights Reserved.
ISSN
0003-9950
eISSN
1538-3687
DOI
10.1001/archopht.1985.01050040022009
Publisher site
See Article on Publisher Site

Abstract

Abstract To the Editor. —It was with great interest that I read the article by Bresnick and al1 on the predictive values of the oscillatory potentials (OPs) in diabetic retinopathy. I was somewhat disappointed by the great variability (Table 2) of the results obtained. It is my feeling that the observed variability could have been significantly reduced if the authors had made use of a high-pass filter set at 100 cycles per second (cps), rather than the 20 cps used. As mentioned in their article, the frequency components of the electroretinogram are in the 25-cps range for the a and b waves and in the 140-cps range for the OPs. Thus, a low-frequency cutoff set at 20 cps still passes a great deal of both a and b waves, as witnessed in Fig 3. Furthermore, the latter situation makes OP amplitude measurements much more difficult since, as previously acknowledged,2 References 1. Bresnick GH, Korth K, Groo A, et al: Electroretinographic oscillatory potentials predict progression of diabetic retinopathy: Preliminary report . Arch Ophthalmol 1984;102:1307-1311.Crossref 2. Tsuchida Y, Kawasaki K, Fujimura K, et al: Isolation of faster components in the electroretinogram and visually evoked response in man . Am J Ophthalmol 1973;75:846-852. 3. Wachtmeister L, Dowling JE: The oscillatory potentials of the mudpuppy retina . Invest Ophthalmol Vis Sci 1978;17:1176-1188.

Journal

Archives of OphthalmologyAmerican Medical Association

Published: Apr 1, 1985

References