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Documenta Ophthalmologica

, Volume 94, Issue 3, pp 223–237 | Cite as

Early macular dysfunction detected by focal electroretinographic recording in non-insulin-dependent diabetics without retinopathy

  • Micheline C. Deschênes
  • Stuart G. Coupland
  • Stuart A. Ross
  • Gordon H. Fick
Article

Abstract

The focal electroretinogram, which measures the functional integrity of the distal retina of the macula, was recorded with a hand-held stimulator-ophthalmoscope in 26 eyes from patients with non-insulin-dependent diabetes mellitus with normal fundus photography, and in 52 control eyes of similar age range. Implicit time and amplitude of the responses were studied as a function of the age, glycemic control through glycosylated hemoglobin measurement and duration of diabetes. Implicit time and amplitude were significantly delayed (F=5.05, p=0.028) and reduced (F=11.26, p=0.013) in diabetic patients without diabetic retinopathy compared to control subjects. Moreover, there was a significant relationship between the implicit time (r=0.57, p=0.002) and amplitude (r=−0.65, p=0.0004) with the duration of diabetes but not with hemoglobin Alc. These results strongly suggest an early macular dysfunction in noninsulin-dependent diabetes mellitus before the appearance of diabetic retinopathy.

Key words

diabetic retinopathy focal electroretinogram macula maculopathy non-insulin-dependent diabetes mellitus ischemia 

Abbreviations

DR

diabetic retinopathy

HbAlc

glycosylated hemoglobin

NIDDM

non-insulin-dependent diabetes mellitus

SASDR

Southern Alberta Study of Diabetic Retinopathy.

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Micheline C. Deschênes
    • 1
  • Stuart G. Coupland
    • 1
    • 2
  • Stuart A. Ross
    • 3
  • Gordon H. Fick
    • 4
  1. 1.Visual Electrodiagnostic Research UnitUniversity of CalgaryCanada
  2. 2.Departments of Surgery and Clinical NeurosciencesUniversity of CalgaryCanada
  3. 3.Department of MedicineUniversity of CalgaryCanada
  4. 4.Department of Community Health SciencesUniversity of CalgaryCanada

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