NM_000329.3(RPE65):c.304G>T (p.Glu102Ter) is a nonsense variant that introduces a premature stop codon into exon 4 of 14, and is predicted to lead to nonsense-mediated decay in a gene in which loss-of-function is an established mechanism of disease (PVS1). This variant is present in gnomAD v.2.1.1 at a GrpMax allele frequency of 0.00004117, with 9 alleles / 113674 total alleles in the European (non-Finnish) population, which is lower than the ClinGen LCA / eoRD VCEP PM2_Supporting threshold of <0.0002 (PM2_Supporting). At least one proband harboring this variant exhibits a phenotype including childhood onset, nystagmus (1 pt), nyctalopia, reduced visual acuity (1 pt), undetectable electroretinogram responses from rods (0.5 pts) and cones (1 pt), and decreased peripheral vision (1 pt), which together are specific for RPE65-related recessive retinopathy (4.5 total pts, PMID: 11095629, PP4). This variant has been reported in at least 1 proband with early-onset severe retinal dystrophy who was homozygous for the variant (0.5 pts, PMID: 15512997, PM3_Supporting). The variant has been reported to segregate with childhood-onset severe retinal dystrophy through the proband plus 1 similarly affected relative, with the variant present in the homozygous state (PMID: 15512997, PP1). In summary, this variant meets the criteria to be classified as Pathogenic for RPE65-related recessive retinopathy based on the ACMG/AMP criteria applied, as specified by the ClinGen LCA / eoRD VCEP: PVS1, PM2_Supporting, PM3_Supporting, PP1, and PP4. (VCEP specifications version 1.0.0; date of approval 09/21/2023).