IL1A and pterygium: The pharmacological effect of S. dendroideum in the process of corneal scar formation in a pterygium model was evaluated, and the follow-up of the evolution of the scarring process, allowed to define that the treatment with S. dendroideum had an immunomodulatory effect by decreasing TNF-α, IL-1α, and maintaining the level of IL-10 expression, without difference with respect to the healthy control, demonstrating that traditional medical use of S. dendroideum sap to treat pterygium is fully justified by its compound composition.