The following instructions are based on the original description supplied with the game Tomahawk, other titles may have used other methods or steps.
1. After the game has loaded a wide 'H' shape is displayed in the centre of the screen. The unfolded LensLok is held up to the screen horizontally aligned with the cross-bar of the 'H'. Using the keyboard, the user adjusts the width and height size of the 'H' to match the dimensions of the LensLok.
2. After the screen has been calibrated, a scrambled 'OK' is displayed on the screen. To read this, the LensLok is folded at both ends, turned 90 degrees and aligned with a vertical line in the centre of the scrambled symbols. When the user has recognised the 'OK', by closing one eye and viewing the code through the prisms of the LensLok, they can advance to the actual code.