Multifocal pupillary light response fields in normal subjects and patientswith visual field defects

The optimal conditions for recording focal pupillary light responses with a multifocal stimulation technique were determined, and the technique was ap plied to normal subjects and patients with visual held defects. Thirty-seve n hexagonal stimuli were presented on a TV monitor with a visual field of 4 0 degrees diameter under a constant background illumination. Using a slow ( 4.7 Hz) m-sequence, reliable focal responses were obtained in both normal s ubjects and patients. The pupillary held and visual field were well correla ted in patients with retinal diseases, but the correlation was not strong i n patients with optic-nerve diseases. Pupillary light responses were reduce d in the blind hemifield in patients with post-geniculate lesions. These re sults indicate that the multifocal stimulation technique can be used clinic ally to obtain a pupillary field for objective visual field testing. (C) 20 01 Elsevier Science Ltd. All rights reserved.