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对比敏感度对诱发的快速周期性散焦振荡具有耐受性。

Contrast sensitivity is resilient to induced fast periodic defocus oscillations.

作者信息

Pourreza Ghoushchi Vahid, Mompeán Juan, Prieto Pedro M, Artal Pablo

机构信息

Laboratorio de Óptica, Instituto Universitario de Investigación en Óptica y Nanofísica, Universidad de Murcia, Campus de Espinardo (Edificio 34), E-30100 Murcia, Spain.

出版信息

Biomed Opt Express. 2024 May 20;15(6):3848-3858. doi: 10.1364/BOE.521340. eCollection 2024 Jun 1.

DOI:10.1364/BOE.521340
PMID:38867768
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11166443/
Abstract

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.

摘要

本研究调查了周期性散焦振荡对对比度敏感度的潜在影响。在校准其动态行为后，通过一个可调节焦距的透镜产生了频率为5、15和25Hz的正弦波动，散焦峰谷值范围为0.15至3D。对五名年轻正视眼受试者的单眼对比度敏感度进行了测量。实验数据表明，在很宽的频率和幅度范围内，由散焦波动导致的对比度敏感度损失较低。仅在所研究的更严重的情况（25Hz，±1.5D）下，大多数受试者的对比度阈值出现了明显增加。将实验数据与散焦视网膜点扩散函数时间积分导致的调制损失模拟进行定性比较，表明眼睛对散焦模糊的积分时间较短，约为甚至低于百分之一秒。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/959af96af8ed/boe-15-6-3848-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/7c62b887beac/boe-15-6-3848-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/b22073736134/boe-15-6-3848-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/e68d2ea0e4da/boe-15-6-3848-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/087290470bd0/boe-15-6-3848-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/3fbb9647b21c/boe-15-6-3848-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/959af96af8ed/boe-15-6-3848-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/7c62b887beac/boe-15-6-3848-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/b22073736134/boe-15-6-3848-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/e68d2ea0e4da/boe-15-6-3848-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/087290470bd0/boe-15-6-3848-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/3fbb9647b21c/boe-15-6-3848-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4385/11166443/959af96af8ed/boe-15-6-3848-g006.jpg

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Stability of the retinal image under normal viewing conditions and the implications for neural adaptation.正常观看条件下视网膜图像的稳定性及其对神经适应的影响。
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Temporal fluctuations in defocus may reverse the acuity loss encountered with induced refractive errors.散焦的时间波动可能会逆转诱导屈光不正引起的视力损失。
J Opt Soc Am A Opt Image Sci Vis. 2023 Nov 1;40(11):2008-2018. doi: 10.1364/JOSAA.497091.
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Defocus flicker of chromatic stimuli deactivates accommodation.色刺激的散焦闪烁会使调节失活。
Biomed Opt Express. 2023 Jun 26;14(7):3671-3688. doi: 10.1364/BOE.486466. eCollection 2023 Jul 1.
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Impact of temporal fluctuations in optical defocus on visual acuity: Empirical results and modeling outcomes.光学离焦的时间波动对视力的影响：实证结果和模型结果。
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