Baker R, Brown B, Garner L
Invest Ophthalmol Vis Sci. 1983 Nov;24(11):1528-31.
When the eye is deprived suddenly of visual stimulation, the accommodative system drifts from the previous state of accommodation to a state known as the dark focus. This condition also is known as night myopia. We measured the time course of this drift using a continuously recording infra-red optometer. The time course resembles an exponential decay function with a time constant of 1-3 seconds. The recovery of accommodation to the prior level after visual stimulation is restored suddenly has a time constant of 0.2-0.4 seconds. The state of accommodation in the dark depends on the state of accommodation prior to the onset of darkness. Our subjects showed a zone of accommodative inactivity rather than a single resting point of accommodation.
当眼睛突然被剥夺视觉刺激时，调节系统会从先前的调节状态漂移到一种被称为暗焦点的状态。这种情况也被称为夜间近视。我们使用连续记录的红外验光仪测量了这种漂移的时间进程。该时间进程类似于一个时间常数为1 - 3秒的指数衰减函数。在视觉刺激突然恢复后，调节恢复到先前水平的时间常数为0.2 - 0.4秒。黑暗中的调节状态取决于黑暗开始前的调节状态。我们的受试者表现出一个调节不活动区域，而不是一个单一的调节静止点。
