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Waveforms are prolonged and reduced but recordable in all patients.
A, Montage of posterior pole, right eye, at age 78 years. Mild vascular attenuation is seen in the inferior temporal arcades, as well as optic disc pallor. Bone spiculelike pigmentation is noted inferiorly, and the macula demonstrates retinal pigment epithelial atrophy and clumping. B, Goldmann perimetry. The right eye can only see to the I4e isopter.