Injection molded optical plastics, widely used in 3D applications, have become smaller and lighter. The flow-induced anisotropic property would be significant in smaller filling cavities. As a result, key optical issues, such as birefringence, retardation, or polarization, would be a bottleneck in the design-to-manufacturing process. Based on the three-dimensional filling analysis and the viscoelastic analysis, Moldex3D Optics helps designers visualize the optical performance and evaluate process conditions. Furthermore, integrated with CODE V, users are allowed to export the deformed shape and refractive distribution into CODE V for design verification and optimization.