Computer monitor at the wrong height

The *Thai Journal of Ergonomics* reports a statistically significant relationship ($p < 0.001$) between work-related neck and shoulder discomfort and eye fatigue, as well as high levels of mental workload stress ($p = 0.003$). These issues arise when the monitor is positioned too low or too far away, forcing neck muscles to remain tense to support the head as it leans forward, while eye muscles are subjected to intense, continuous focusing for periods exceeding two hours.

The national ergonomics standard aligns with the new requirements set forth in the *Standard for Ergonomic Computer-Based Office Work* (TOSH 2569), which stipulates that the top of the monitor must be positioned at eye level and the viewing distance adjusted to suit the individual's specific needs.

To simultaneously address neck pain and eye strain, using a gas-spring, modular monitor arm allows for the free adjustment of height, tilt, and extension. This enables the top edge of the screen to align perfectly with eye level, reducing strain on the trapezius muscles in the neck and shoulders while positioning the eyes perpendicular to the screen at the most comfortable viewing distance.

Alternatively, using an adjustable, clamp-on keyboard tray helps resolve posture issues by positioning the keyboard and mouse so that your elbows form a 90-degree angle and your shoulders remain relaxed rather than tensed or raised. When paired with a monitor arm, this setup facilitates a perfect "neutral posture," effectively reducing accumulated tension in the cervical spine and lowering the risk of premature cervical disc degeneration. It also helps prevent eye strain and afternoon headaches, allowing you to work in greater comfort and maintain better focus on your tasks.

Prevent productivity loss due to presenteeism (working with reduced efficiency caused by pain) and lower sick leave rates, aligning with organizational well-being management practices and ESG goals (Social / Employee Wellbeing).