Laura
Retinitis pigmentosa is an eye disease in which there is damage to the retina. The damage gets worse (progresses) over time.
There is no effective treatment for the Retinitis pigmentosa condition.
Wearing sunglasses to protect the retina from ultraviolet light may help preserve vision. Do you wear sungalsses?
Controversial studies have suggested that treatment with antioxidants (such as vitamin A palmitate) may stop the disease from getting worse. I have no idea if this can work, you may investigate it yourself.
Several clinical trials are in progress to investigate new treatments for retinitis pigmentosa.
Microchip implants that go inside the retina are in the early stages of development for treating blindness associated with this condition.
You may find help by seeing a low-vision specialist.