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:: Volume 20, Issue 1 (Iranian Journal of Ophthalmology 2008) ::
2008, 20(1): 20-24 Back to browse issues page
Oscillatory Potentials in Diabetic Retina without Retinopathy
Morteza Movasat Dr., Mohsen Modarresi Dr., Mohammad-Reza Mansouri Dr., Mehdi Nili-AhmadAbadi Dr., Mohammad-Taher Rajabi Dr. *
, mt_rajabi@yahoo.com
Abstract:   (14904 Views)

Purpose: To study recordings of oscillatory potentials (OPs) of the electroretinogram (ERG) in diabetic eyes that have no visible fundus alterations, to ascertain whether changes in sensitivity are evident when compared with recordings from age-matched controls.

Methods: OPs of the ERG were measured from 68 eyes of 34 patients with diabetes without retinopathy and from 30 eyes of 15 normal subjects.

Results: A reduction in the amplitude of each oscillatory potential, as well as delayed implicit time of each oscillatory potential peak could be found in diabetic patients without retinopathy although not all significant. Decrease in the amplitude of OP1 and summed OP (OP-sum) and also delayed the implicit time of OP1 were seen between diabetic patients with no observable diabetic retinopathy.

Conclusion: Patients with diabetes without retinopathy show prolonged latencies in OPs recordings and decreased in amplitudes of OP-1 and OP-sum. This indicates an alteration in inner retinal sensitivity or ischemic change of overall retinal layer that can be explained by an impaired rod-cone interaction.

 

Iranian Journal of Ophthalmology 200820(1):20-24
Keywords: oscillatory potential, electroretinogram, diabetic retinopathy
Full-Text [PDF 104 kb]   (3276 Downloads)    
Type of Study: Original | Subject: General
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Movasat M, Modarresi M, Mansouri M, Nili-AhmadAbadi M, Rajabi M. Oscillatory Potentials in Diabetic Retina without Retinopathy. Iranian Journal of Ophthalmology. 2008; 20 (1) :20-24
URL: http://irjo.org/article-1-110-en.html


Volume 20, Issue 1 (Iranian Journal of Ophthalmology 2008) Back to browse issues page
مجله چشم پزشکی ایران Iranian Journal of Ophthalmology
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