[Effect of induced hyperglycemia on contrast sensitivity function in insulin-dependent diabetic patients].
Acute hyperglycemia in diabetes mellitus is often associated with transient subjective visual disturbances that have not yet been objectively evaluated. We used a contrast sensitivity (CS) test to assess functional visual disturbances in provoked hyperglycemia in 20 patients with well-controlled insulin-dependent diabetes (40 eyes) with no evidence of diabetic retinopathy and with intact visual acuity (age: 32 +/- 8.2 years, duration of diabetes: 11.4 +/- 7.3 years). The CS function was measured by using the CSV-1000 CS test, which is rapid and easily comprehended by the patient and encompasses four spatial frequencies, 3 (A), 6 (B), 12 (C) and 18 (D) cycles/degree. At each frequency, eight pairs of circular targets differing stepwise in contrast were presented simultaneously. The number of targets seen by each patient in the four spatial frequencies at euglycemic (116 +/- 14.7 mg/dl) and hyperglycemic (274 +/- 52 mg/dl) levels, expressed as the CS score, was recorded and afterwards analyzed. The differences in mean CS scores at the individual frequencies at euglycemic versus hyperglycemic levels were statistically significant (p < 0.001). Visual acuity remained stable during hyperglycemia. There was no significant difference in the amount of CS reduction between the group of patients that had had diabetes for a duration of more than 10 years and the group who had had diabetes for less than 10 years.(ABSTRACT TRUNCATED AT 250 WORDS)
Mangouritsas
G
G
Universitäts-Augenklinik Patras.
Katoulis
E
E
Kepaptsoglou
O
O
Zoupas
C
C
D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D001813:Blood-Retinal Barrier / Q000502:physiology; D015350:Contrast Sensitivity / Q000502:physiology*; D003922:Diabetes Mellitus, Type 1 / Q000503:physiopathology*; D003930:Diabetic Retinopathy / Q000503:physiopathology*; D005260:Female; D006801:Humans; D006943:Hyperglycemia / Q000503:physiopathology*; D008297:Male; D012016:Reference Values; D014792:Visual Acuity / Q000502:physiology
D001786:Blood Glucose
Effekt von provozierter Hyperglykämie auf die Kontrastempfindlichkeitsfunktion bei insulinpflichtigen Diabetikern.