A retinopathy, typically severe and early onset, caused by biallelic variants in the NMNAT1 gene. Some patients have been reported to have spondyloepiphyseal dysplasia syndrome, including sensorineural hearing loss, intellectual disability in addition to retinopathy. However, additional studies are needed to definitively describe this disease association. The disease is NMNAT1-related retinopathy (Monarch Disease Ontology id MONDO_0800101).