Figure 1

Means and standard deviations for monocular luminance contrast sensitivity of controls and diabetic patients. (A) Controls (filled circles) versus diabetic patients without retinopathy (empty diamonds). (B) Controls (filled circles) versus diabetic patients with retinopathy (empty squares). Controls had higher contrast sensitivity than diabetics in all conditions measured, but the level of significance (p < 0.05) was reached only in the conditions marked with asterisks (*). There was contrast sensitivity attenuation at 15 and 20 cpd for patients without retinopathy, and in the range between 0.5 and 30 cpd for patients with retinopathy. There was no statistical difference between the two diabetic groups in any spatial frequency. DM 2: type 2 diabetes.