This meticulously crafted PMMA lens mold has been designed with full consideration of the material properties of PMMA, including its low refractive index, excellent high light transmittance, and limitations in flowability. To ensure the smooth progress of injection molding, we have employed advanced mold design techniques and refined injection strategies, carefully adjusting the mold’s geometric structure, and cooling system. The aim is to effectively address common issues such as weld lines, stress marks, bubbles, and shrinkage that may arise during the injection molding process of PMMA. Our design not only focuses on enhancing the optical performance of the product but also emphasizes improving the durability of the mold and meeting the aesthetic requirements of the product.