How does a sleep mask assist in polysomnography?

In the context of polysomnography, sleep masks serve several important functions that enhance the quality of the sleep study and patient experience. One key role is their capacity to block external light. This function is crucial because light can disrupt natural sleep patterns and affect the data collected during the study. By minimizing light exposure, a sleep mask helps create a more conducive environment for sleep, improving the accuracy of sleep stage assessment and overall study results.

While the monitoring of eye movements is an essential component of polysomnography to assess sleep stages, it is typically achieved through electrodes placed around the eyes rather than through a mask. Additionally, masks can aid in comfort and might help with airway management, particularly in patients with sleep apnea, but these are secondary to their primary role in promoting an unobstructed sleep environment free from light interference. Thus, the ability of a sleep mask to block external light is a vital aspect that contributes significantly to the effectiveness of polysomnography.