后方焦点
Rear focal point
以上为机器翻译结果，长、整句建议使用 人工翻译 。
不知不觉中，眼睛会反复试图把焦点切换到屏幕后方的某个区域，以获得放松，而在屏幕和放松点之间的不停切换，会导致眼部疲劳。
Unconsciously, the eyes repeatedly attempt to rest by shifting their focus to an area behind the screen, and this constant switch between screen and relaxation point creates eyestrain and fatigue.
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