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  • Early cone dystrophy

    Courtesy of Zoë R. Williams, MD.
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    Neuro-Ophthalmology/Orbit
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    Early cone dystrophy. A and B, Color photographs show a normal-appearing fundus. C and D, Multifocal electroretinogram (mfERG) shows loss of the central peak bilaterally compared with normal reference. E and F, mfERG demonstrates flattening of the foveal waveforms bilaterally.