Objective: To conduct a comparative analysis of layer-by-layer macular thickness, peripapillary retinal nerve fiber layer (pRNFL), and minimum rim width (MRW) between the eyes of patients with prostate cancer undergoing treatment with androgen receptor pathway inhibitors (ARPIs) and those of age- and sex-matched healthy controls, with the aim of assessing the potential effects of ARPIs on retinal structure. The gene discussed is AR; the disease is Familial prostate cancer.