Role of UC-MSC and CM to Inhibit Vision Loss in Retinitis Pigmentosa Phase I/II

Inclusion Criteria: * Visus more than 20/100 * Have more than 0.68 uV on conical receptor cell amplitude checked by ERG * Visual field equivalent diameter more than 10o * Willing to sign informed consent as research subjects * Willing to do the peribulbar injection with mesenchymal stem cells isolated from umbilical cord tissue * Willing to do visual field checks with Humphrey's perimetry, vision tests with Snellen boards, Optical Coherent Tomography (OCT) examinations, electroretinogram examinations, and fill out a quality of life questionnaire Exclusion Criteria: * Pregnant or nursing women * Positive result of HIV test * Have a history of eye tumors * Under immunosuppressive treatment or other drugs that can affect the growth of transplanted stem cells * Have another eye disease such as diabetic retinopathy, uveitis, cataract, and glaucoma * Do not come to control according to the schedule determined by the researcher (loss to follow up)