Retinitis pigmentosa and Leber’s congenital amaurosis are rare inherited retinal distrophies that lead to irreversible blindness. The remarkable genetic heterogeneity of these diseases is due not only to the large number of genes involved, but also to the fact that mutations in a particular gene can cause different phenotypic variants, varying in severity, disease progression and inheritance. Logically, there is no unified classification that combines all clinical and genetic forms of the retinal pigment dystrophies. In this context, epidemiological research in clinical practice encompasses the studied contingents by different clinical-genetic and age criteria. This makes it extremely difficult to study and evaluate the epidemiology of the various forms of inherited retinal dystrophy. Despite the existence of clinical experience and a thorough knowledge of these diseases in Bulgaria, there is no published epidemiological data for the local population. This publication aims to analyze epidemiological data on retinitis pigmentosa and Leber congenital amaurosis and to provide an epidemiological assessment of the prevalence of these diseases in Bulgaria. For more information click here.