Retinitis pigmentosa (RP) is a group of inherited disorders that cause vision loss. This vision loss is progressive and will typically begin in childhood, starting with the loss of night vision. This is followed by the loss of peripheral vision and eventually central vision will be affected. Many individuals with RP become legally blind in their adult years. Vision loss is variable and there is no way to predict how much vision will be lost and how fast it will happen. There is no cure for RP, though there are an increasing number of optical aids to help see with reducing vision, as well as a number of therapies that are being tested for efficacy with RP at this time. One of the many causes of RP is pathogenic variants in the DHDDS gene.