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A 19-month-old girl with nystagmus, paradoxical pupillary response and low vision
Digital Journal of Ophthalmology 2008
Volume 14, Number 6
February 25, 2008
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Sandra Rocio Montezuma, M.D. | Massachusetts Eye and Ear Infirmary



Ancillary Testing
Electroretinography
An electroretinogram (ERG) was performed and showed that the cone and cone-driven responses were absent or markedly attenuated. The rod responses were present but mildly attenuated. (See Figure 3)
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Figure 3
 Electroretinogram (ERG) showing the absence of cone and cone-driven responses with decreased rod responses.



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