OpSim, an advanced ophthalmic surgical simulator, has been designed to help medical residents practice in a realistic, repeatable environment, either independently or under mentor supervision, while keeping patients out of the operating room. It provides a measurable intraocular surgical experience that is difficult to replicate in traditional wet labs. Using specialized tools like cataract surgery handpieces and instruments, residents have learned to manipulate tools with precision, improving skills such as phacoemulsification, forceps handling, and complex techniques like advanced capsulorhexis. The simulator offers instant feedback after each training module and generates detailed reports, enabling residents to track their progress and develop essential skills, from basic procedures to advanced surgical methods.