How would you go about finding ongoing trials and learning about new discoveries on the Retinitis Pigmentosa issue?

Try searching www.clinicaltrials.gov

ClinicalTrials.gov is a registry of federally and privately supported clinical trials conducted in the United States and around the world. ClinicalTrials.gov gives you information about a trial's purpose, who may participate, locations, and phone numbers for more details. This information should be used in conjunction with advice from health care professionals.