Visual evoked potentials in patients of insulin-dependent [type 1] diabetes melliyus

ABSTRACT

The latencies and amplitudes of visual evoked potentials [VEPs] were recorded in 30 patients of insulin-dependent [type1] diabetes mellitus and 15 age and sex matched non- diabetic controls to find out subclinical involvement of optic nerve in diabetic patients. The P100 latency of VEPs was highly significantly [P< 0.001] and the N75, N145 latencies were significantly [P<0.01], prolonged in diabetic patients as compared to the non- diabetic controls. Subclinical optic neuropathy was found in 40% of the diabetic patients. There was non- significant [P>0.05] correlation of P100 latency of the VEPs with duration of diabetes mellitus, fasting blood glucose and glycosylated haemoglobin [HBA][1c] level