About X-linked retinitis pigmentosa (XLRP)
Retinitis pigmentosa (RP) describes a group of rare genetic eye diseases that damage light-sensitive cells in the retina, leading to loss of sight over time. In about 10% of RP cases, the non-working gene is passed down from the mother to her children resulting in a form of RP known as XLRP. XLRP is associated with mutations in genes located on the X chromosome, which means the condition predominantly affects boys and young men. However, some females may be affected as well.
XLRP causes gradual vision loss. The disease begins with night blindness and is followed by a slow narrowing of the peripheral field of vision. In general, the decline in vision (also referred to as “visual acuity”) results in a person becoming legally blind in their 40s.
Further information about how RP is inherited and the impact on the vision of male and female children can be found here.