The image in the HTC Vive HMD looks out of focus, can I make it sharper?

VR Integration Tobii Pro
Yes, make sure the HMD is positioned correctly so the eyes are in the middle of the lenses, then adjust the Inter Pupillary Distance using the dial on the front right bottom corner of the HMD. Ask the participant if the image becomes sharper while adjusting. Ideally measure and adjust the IPD (requires an IPD measure tool or ruler) to this measurement before calibration for best results.