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[Fast frequency electroretinogram differentiates ocular hypertension].

On the basis of the 30 Hz responses it was possible to divide the patients (total 38 eyes) into two groups. The PERGs of one group (abnormal OHT) resembled responses of typical glaucomatous eyes, with greatly diminished or abolished 30 Hz amplitudes. The PERGs of the other group (normal OHT) were indistinguishable from those of normal eyes.