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[Differential diagnosis in visual field defects of glaucoma patients].

In both cases optic disc neuropathy with perimetry defects and loss of vision is caused by a cerebral tumour. The progression of optic damage was stopped by resection of the tumor in both patients. We recommend the performance of a radiological examination in patients with visual field defects if the intraocular pressure is normal and thus glaucoma may not be the cause of the defects.