If you are new to OpticStudio STAR module, we have an introductory Knowledgebase article that describes how to import FEA data into OpticStudio at https://support.zemax.com/hc/en-us/articles/4403424316563-OpticStudio-STAR-Module-Data-import-and-analysis-tutorial.
This KBA comes with a downloadable sample file. It’s a step by step tutorial to show you how to import FEA data into OpticStudio and how to perform analysis.