Frequency Doubling Technology Changes Of NIDDM Patients

Objective: To detect the center visual field sensitivity of non-insulin dependent diabetes mellitus (NIDDM) patients secondly to evaluate the effect of Frequency doubling technology(FDT) in the diagnosis of diabetic retinopathy. Methods: 50 patients were divided into three groups : 20 non-insulin dependent diabetes mellitus (NIDDM) patients without diabetic retinopathy, 15 patients with diabetic retinopathy ,15 normal people without diabetes. FDT was used to estimate the changes of the center visual field sensitivity . Results: The center retinal sensitivity of diabetic patients without diabetic retinopathy has declined, that of patients with diabetic retinopathy declined significantly as compared with normal people and diabetic patients without retinopathy (P<0.001). Conclusion:The retinal neurosensory function of diabetic patients is damaged in some degrees before diabetic retinopathy occurred. It is suggested that the examination of center visual field with FDT is a sensitive index of neuropathy of early diabetes mellitus .