Figure 1.

Blood stasis as effect of RP in Chinese medicine. In Chinese medicine, the main etiologies of RP include congenital deficiency, liver and kidney deficiency, and spleen and stomach deficiency; these etiologies are accompanied by nourishment and blood insufficiency, essence and blood insufficiency, and Qi and blood insufficiency in the eyes, respectively. The main etiologies may be independent or complex and can even be converted to each other. With the influence of these etiologies, patients of RP manifested vision impairment; vascular thinning, which the pathology process performs as photoreceptor death; and blood stasis.