A Study of Pentosan Polysulfate Sodium and the Development of Pigmentary Maculopathy and Pigmentary Retinopathy

The purpose of this study is to evaluate incidence and prevalence rates of the study endpoints (pigmentary maculopathy \[PM\]/ pigmentary retinopathy \[PR\]/Any, PM/PR/ pentosan polysulfate sodium \[PPS\], and PM/PR/Non-PPS) in relation to PPS exposure, and in participants with interstitial cystitis (IC) but not exposed to PPS; changes in visual acuity (VA) over time; participant treatment journey leading to PPS treatment, and potential risk factors associated with the occurrence of PM/PR/PPS.