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Although patients with CHD appeared unaffected in the standard eye examinations, the disturbances in the white-noise field campimetry indicated a functional visual impairment. Together with the changes in the perilimbal vessels of the conjunctiva and the retinal vessels, a disturbed ocular microcirculation as the underlaying cause could be discussed.

In retinal disorders defects in multifocal ERG presented the similar pattern as scotomata in perimetry. The patient with visual field defects due to disturbances in the chiasma exhibited a normal ERG-topography. In patients with visual field defects multifocal ERG supported differentiation of the location of the lesion.

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