I have peripheral vision loss, but not night blindness. After a retinal exam, my doctor told me that I have retinitis pigmentosa (RP). Is X-linked congenital stationary night blindness (XLCSNB) a form of RP or a completely different disease? I read that in the incomplete form of XLCSNB, the damage is stationary and the patient may not have night blindness. Is it possible that I am in this group?