This study investigates the effects of seating position and the use of lazy glasses on ergonomic comfort, posture, eye fatigue, and gaming experience among mobile gamers. Ten male participants aged 16–24 years, with normal BMI and daily experience playing Mobile Legends for at least two hours, were tested in four experimental conditions involving gaming chairs and beanbags, with and without lazy glasses. Discomfort levels were measured using the Borg scale, eye fatigue via the Visual Fatigue Index, posture via inertial motion capture, and gaming experience using the Game Experience Questionnaire (GEQ). Statistical analysis was conducted using repeated-measures ANOVA in SPSS v25. Results revealed that sitting position significantly influenced discomfort levels (p < 0.05), particularly in the wrist area (p = 0.044), while lazy glasses significantly increased eye fatigue (p < 0.01) and affected neck posture (p = 0.017). Repetition was also a significant factor contributing to both discomfort (p < 0.05) and eye fatigue (p < 0.01). However, no significant effects were found on overall gaming experience (p > 0.05). These findings suggest that gaming chairs provide better ergonomic support than beanbags and that lazy glasses may exacerbate visual strain, particularly during high-interaction mobile gaming sessions.
