| Oscillatory potentials of local macular ERG in diabetic retinopathy. |
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Ill Han Yoon, Noriyasu Shiroyama, Yozo Miyake, Sinobu Awaya |
1Department of Ophthalmology, Inje University, College of Medicine, Paik Hospital, Pusan, Korea.
2Department of Ophthalmology, Nagoya University, School of Medicine, Nagoya, Japan. |
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| Abstract |
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The oscillatory potentials (OPs) in electroretinogram (ERG) have clinical values in measuring retinal functions of the early stage of diabetic retinopathy.However, OPs have, until now, been evaluated as components of total ERG recorded with a full field stimulus over the entire retina. Therefore, little information could be obtained about the macular condition (diabetic retinopathy). Using focal stimuli, we successfully recorded OPs in the human macular region. We modified our previously reported system for recording local macular ERG under the fundus monitor with an infrared television fundus camera. We evaluated macular OPs with simultaneously recorded a-and b-waves in many patients with diabetic retinopathy. In some kinds of early diabetic maculopathy, the macular OPs were selectively reduced, leaving the a- and b-waves intact. The macular OPs can be a valuable indicator in assessing the macular function in diabetic maculopathy. |
| Key Words:
oscillatory potentials;local ERG;macular lesion;diabetic retinopathy |
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