Does retinitis pigmentosa always lead to complete blindness?

No: Retinitis pigmentosa is a set of diseases that is variable. Some people have mild vision loss while others lose it all.

Retinal Chip: Retinitis pigmentosa is a group of inherited disorders that cause degeneration of the retina and vision loss. Depending on the type, some vision can be retained throughout life, in other cases, not. The most common symptoms are night blindness and gradual loss of peripheral vision. There is a new retinal implant which restores crude central vision( argus ii) for those who are blind from rp.

RP variable: RP is a collection of several different conditions with a similar phenotype or appearance. Some are inherited, some aren't. RP progresses at different rates in different people and families. So the answer is probably not.

Not all: There are different forms but not all lead to complete blindness. There is nor real cure. The disease progresses at different rates