In this study featuring the RETevet device, researchers have identified 4 related NHPs at the California National Primate Research Center with visual impairment and findings from clinical ophthalmic examination, advanced retinal imaging, and electrophysiology consistent with achromatopsia.

The subjects were dilated and dark adapted for electrophysiologic testing. Scotopic and photopic full-field electroretinograms (ERGs) were performed on controls and demonstrated normal rod and cone responses.