The same group of researchers also discovered the significance of font size in reading within virtual reality (VR). They introduced a novel unit of measurement called distance independent millimeter (dmm), which ensures a consistent display of characters across various distances and VR screens. This unit has gained widespread acceptance in both industry and research. In one particular study that employed the dmm unit, the researchers investigated text box size, text size, and user preferences. The findings revealed that an angular text size of approximately 41dmm with a variation of +/- 14 dmm was recommended. The participants expressed a preference for white text on a black background and sans-serif fonts like Arial, as opposed to serif fonts such as Times New Roman.