A Study About the Impact of Different Tools on the Accommodative Microfluctuations in Myopic Children During Near Work

CHEN Jiongpu; ZHONG Dingjuan; XIANG Aiqun; CHEN Jiao; LUO Dongqiang; GUO Yingzhuo; HE Shuxi; WANG Hua

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Journal of Hunan Normal University(Medical Science) ›› 2025, Vol. 22 ›› Issue (6) : 197-202.

Clinical Medicine

A Study About the Impact of Different Tools on the Accommodative Microfluctuations in Myopic Children During Near Work

CHEN Jiongpu, ZHONG Dingjuan, XIANG Aiqun, CHEN Jiao, LUO Dongqiang, GUO Yingzhuo, HE Shuxi, WANG Hua

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Abstract

Objective To explore the effects of different tools on accommodative microfluctuations (AMFs) in myopic children during near work. Methods A randomized controlled trial was conducted. A total of 102 myopic children aged 7 to 12 (42 males and 60 females) who visited the Optometry Center of Hunan Provincial People's Hospital from February 2023 to May 2024 were recruited. They were divided into the 20 minutes group (46 cases) and the 40 minutes group (56 cases) according to different eye-using time, And divided into the book group (35 cases), the tablet group (33 cases), and the mobile phone group (34 cases) according to different tools. Participants first underwent general examinations, including vision tests, slit-lamp examinations, and axial length measurements. Subsequently, while engaging in near-vision tasks, participants had their accommodative microfluctuations high-frequency component values (HFC) and pupil diameter measured for the first time using Acomoref2. Then, they were required to read some words on a book, tablet or mobile phone at a near distance under normal lighting conditions. Then, the HFC and pupil diameter were immediately measured for the second time. One way repeated measures analysis of variance (ANOVA) was used for data analysis. Results After 40 minutes of near work, the changes in AMFs caused by reading on mobile phones, tablets, and books were the same, and there was no significant statistical difference among the three groups. After 20 minutes of near work, there was no statistical significance in the HFC when looking at the targets at infinity, 50 cm, and 33 cm among the three groups. However, there was a significant difference in the change value of HFC when looking at the target at 1 m. There was a significant difference in the change of HFC when looking at the target at infinity between 20 minutes and 40 minutes near work. Conclusion For myopic children aged 7-12, reading books at a close distance within 20 minutes makes the accommodative microfluctuations more tense compared to using tablets or mobile phones. As the near work time increases from 20 minutes to 40 minutes, the accommodative microfluctuations of myopic children aged 7-12 gradually changes from unstable to stable.

Key words

myopic children / accommodative microfluctuations / screen time / near work / digital devices

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CHEN Jiongpu, ZHONG Dingjuan, XIANG Aiqun, CHEN Jiao, LUO Dongqiang, GUO Yingzhuo, HE Shuxi, WANG Hua. A Study About the Impact of Different Tools on the Accommodative Microfluctuations in Myopic Children During Near Work[J]. Journal of Hunan Normal University(Medical Science). 2025, 22(6): 197-202

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