Electroretinographic testing in diabetics a comparison study of the burian-allen and the henkes corneal electrodes

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Abstract
A series of 57 diabetics underwent standard electroretinographic recordings for the purpose of testing the effect of insulin on the electroretinograms in diabetes mellitus, specifically on the oscillatory potential changes (Kozak et al., Jap. J. Ophthal. Suppl., 1979.) Use of the speculum-type corneal electrode (Burian-Allen, Hansen Labs.,) produced 9 abrasions in the first 28 patients in this series. However, when the technique of examination was altered by use of the Henkes-type bipolar electrode, only 2 abrasions were produced in the last 29 patients. These frequencies of abrasions are statistically different. The suggestion is made that electoretinographic tracings in diabetics be performed with the use of the Henkes bipolar low-vacuum corneal electrode (Medical Workshops, Holland).

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