Refractive group differences in accommodation microfluctuations with changing accommodation stimulus

Abstract

The magnitude of the microfluctuations in the EMMs and EOMs may be influenced primarily by accommodation response-induced zonular relaxation effects or to changes in the physical properties of the accommodation plant with increasing accommodation response. The LOMs may have an increased baseline neural blur threshold, which appears to modulate the magnitude of the accommodative microfluctuations for low accommodation levels. At higher accommodation demands, the changes in the physical properties of the accommodation plant or the zonular relaxation effects appear to exceed the blur threshold, and the known association between microfluctuations and accommodation stimulus level is restored.

Pattern-Related Visual Stress, Chromaticity, and Accommodation

“…This is unsurprising as Day et al 41 have shown that a greater accommodative response results in a larger variability in the response. The present RMS values are high, but within the range shown by Anderson et al 32 which was 0.1 to 0.7 D for a 2-D response amplitude, even in older participants.…”

Sensitivity of Chaos Measures in Detecting Stress in the Focusing Control Mechanism of the Short-Sighted Eye

“…They found that the LFC power increases more rapidly with accommodative demand for EMMs and EOMs, in comparison to LOMs, and that the standard deviation of the fluctuations is higher in LOMs (Day et al. 2006). …”

Research of accommodative microfluctuations caused by visual fatigue based on liquid crystal and laser displays

“…As a result, it becomes unstable and fluctuates when focusing on an object, and the fluctuation frequency is around a few hertz. These are called accommodative microfluctuations [10,11,[18][19][20][21][22][23][24]. As people with normal vision look at a close object, the activity of the ciliary body is relatively low when compared to viewing a far object.…”

“…Accommodative microfluctuations may be affected by the distance of the target [20,[26][27][28], the pupil diameter [24,[29][30][31], the form of the target [32,33], the luminance of the target [11,34,35], the eye's age, astigmatism [36], visual fatigue [12,20,37,38], biomonocular observation of the target [30,37], and artifacts such as cardiopulmonary signals [39][40][41] or other rhythmical physiological systems. Neurological control also affects the LFC's wavelength, and arterial signals correlate highly to the HFC [11,21].…”