The increased use of self-luminous displays, especially in the evening prior to bedtime, has been associated with melatonin suppression, delayed sleep and sleep curtailment. The present study set out to investigate whether the Night Shift application provided by Apple Inc. for use on its portable electronic devices is effective for reducing acute melatonin suppression, a well-established marker of circadian phase. Participants experienced four experimental conditions: a dim light control, a high circadian stimulus true positive intervention and two Night Shift interventions delivering low and high correlated colour temperature light from the devices. Melatonin suppression did not significantly differ between the two Night Shift interventions, which indicates that changing the spectral composition of self-luminous displays without changing their brightness settings may be insufficient for preventing impacts on melatonin suppression.

中文翻译：

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iPad Night Shift 模式是否会减少褪黑激素的抑制？

自发光显示器的使用增加，尤其是在睡前晚上，与褪黑激素抑制、睡眠延迟和睡眠减少有关。本研究旨在调查由 Apple Inc. 提供的用于其便携式电子设备的 Night Shift 应用程序是否能有效减少急性褪黑激素抑制，这是一种公认​​的昼夜节律标志。参与者经历了四种实验条件：昏暗的灯光控制、高昼夜节律刺激真正的积极干预和两次夜班干预，从设备提供低和高相关色温光。褪黑激素抑制在两次夜班干预之间没有显着差异，