Ten’s research showed that the expression of IL-2, IL-6, monocyte chemoattractant protein-1 (MCP-1), and placental growth factor (PlGF) were significantly up-regulated in the intraocular fluid of RP patients, and the level of IL-8 was higher in presence of glaucoma [26]. The gene discussed is IL2; the disease is retinitis pigmentosa 1.