RGS9 and retinal disorder: RGS9/R9AP-associated retinopathy can be distinguished from oligocone trichromacy on the basis of molecular screening and distinct electrophysiologic findings following extended assessment.3, 5, 10 We conducted this study to characterize the retinal architecture in RGS9/R9AP-associated retinopathy and thereby shed light into any structural differences between oligocone trichromacy and RGS9/R9AP-associated retinopathy.