This product is a serum-free medium meticulously optimized for the in vitro culture of human corneal stromal stem cells. Its scientifically formulated composition provides stable support for efficient cell proliferation and self-renewal, precisely maintaining the cells' unique stem cell characteristics and corneal stromal differentiation potential while effectively preventing phenotypic loss during culture. With clearly defined ingredients and the complete exclusion of animal-derived components, it significantly reduces the risk of contamination from exogenous factors.