摘要
Optical see-through head-mounted displays (OST-HMDs) employ a distinctive method of information presentation that differs from conventional devices. This approach influences the human-computer interaction and text legibility. This study examines the impact of typefaces, letter spacing, and line spacing on OST-HMD text legibility while walking. Two experiments were conducted. Experiment 1 evaluated the influence of two typefaces on text legibility, while Experiment 2 investigated the effects of three levels of letter spacing and line spacing. Both experiments followed the MNREAD protocol. The findings indicated that the selected typefaces did not significantly affect text legibility. However, smaller letters and line spacing negatively affected text legibility. These results will be beneficial in formulating recommendations for typefaces, letter spacing, and line spacing when displaying text on OST-HMDs, enhancing user experience and ensuring optimal legibility in various applications.
•Times New Roman and Arial showed no significant impact on text legibility.•The narrow letter spacing decreased text legibility.•Results will guide OST-HMD text display interface design recommendations.