Eye fatigue is one of the reasons why VR users get simulation sickness. AutoFocus is a simple plug-in that developers can implement in their VR/MR/AR contents to reduce VR users' eye fatigue. With less eye fatigue, users will experience less simulation sickness and thus, play longer. AutoFocus reduces eye fatigue by matching accomodation and convergence and automatically adjusts VR/MR/AR contents while providing calibration tool for developers to optimize & maximize the adjustment. AutoFocus supports any kinds of HMDs in the market. Try AutoFocus now! It is the first plug-in that is easy to use, cost effective, and independent of any kind of hardware modification.