Results We applied TruSight One Clinical Exome sequencing to examine a bioinformatic gene panel of 65 IRD genes, which identified RPGRIP1 variants in 2 patients, LCA-1 and LCA-2, with poor vision and nystagmus manifested in the first 3 months of life. Electroretinograms showed reduced responses, and poor visual acuity was consistent at last review at ages 29 and 27 years for LCA-1 and LCA-2, respectively, with ophthalmic changes characteristic of LCA (Figures S1A and S1B).