Temporal changes in accommodative responses to periodic visual motion

Umemoto, Shunya; Hirata, Yutaka

doi:10.1016/j.visres.2021.107969

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…Bartuzel et al [ 20 ] induced fast vibrations in defocus but they did it around a defocus, as they were interested in the potentially beneficial effect of fluctuations for ametropic subjects. On the contrary, Umemoto and Hirata induced 1-Hz defocus fluctuations but they studied the accommodative response and not visual quality [ 32 ]. Ampolu et al [ 21 ] studied the effect of simulating the broadband fluctuations of defocus (associated to accommodative spasm) and therefore could not study the effect of different temporal frequencies and varying amplitudes.…”

Section: Discussionmentioning

confidence: 99%

Contrast sensitivity is resilient to induced fast periodic defocus oscillations

Pourreza Ghoushchi,

Mompeán,

Prieto

et al. 2024

Biomed. Opt. Express

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This study investigates the potential effects of periodic defocus oscillations on contrast sensitivity. Sinusoidal fluctuations at 5, 15, and 25 Hz, with defocus peak-to-valley values ranging from 0.15 to 3 D, were induced by means of a focus-tunable lens after calibrating its dynamic behavior. Monocular contrast sensitivity was measured on five young emmetropic subjects. The experimental data shows that contrast sensitivity loss due to defocus fluctuations is low for a wide range of frequencies and amplitudes. Only for the more severe case studied (25 Hz, ± 1.5 D) contrast threshold showed a clear increase in most subjects. Qualitative comparison of the empirical data with a simulation of modulation loss due to time integration of defocused retinal point spread functions, suggests a short integration time by the eye for defocus blur, around or even below a hundredth of a second.

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Section: Discussionmentioning

confidence: 99%