Zhang Guanghong, Jiang Jun, Wei Qian, Qu Chao
Department of Ophthalmology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave West Hi-Tech Zone, Chengdu, CN 611731, China.
School of Medicine, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave West Hi-Tech Zone, Chengdu, CN 611731, China.
Heliyon. 2024 Apr 16;10(8):e29298. doi: 10.1016/j.heliyon.2024.e29298. eCollection 2024 Apr 30.
To investigate the effects of accommodation on the geometrical parameters of human lens.
Eight databases from inception to November 2023 were used for the literature search: CNKI, CBM, VIP, Wan-Fang, PubMed, Web of Science, EMBASE, and the Cochrane Library. The Methodological Index for Non-randomized Studies was used to assess the risk of bias. The PRISMA were followed and the following outcomes were taken into consideration: lens diameter (LD), lens thickness (LT), anterior curvature radius (ACR), posterior curvature radius (PCR), lens center position (LCP), and total cross-sectional area (TCSA). This systematic review was registered on an international platform for registered systematic reviews and meta-analysis (INPLASY202260085).
A total of 19 studies were included. LT increased by 0.04 mm/D (18 studies; 95% confidence interval [CI], 0.03-0.06; = 96.6%; < 0.001). At the same time, LD, ACR, and PCR decreased by 0.06 mm/D (6 studies; 95%CI, -0.07-0.05; = 50.1%; < 0.001), 0.53 mm/D (8 studies; 95%CI, -0.64-0.41; = 96.5%; < 0.001), and 0.14 mm/D (9 studies; 95%CI, -0.19-0.09; = 94.7%; < 0.001) during accommodation, respectively. Moreover, LCP shifted forward by 0.01 mm/D (3 studies; 95%CI, -0.02-0.00; = 0.0%; < 0.001), and TCSA by 0.58 mm/D (2 studies; 95%CI, 0.41-1.57; = 97.0%; = 0.457) during accommodation.
Changes in LT, LD, ACR, PCR and LCP supported Helmholtz's theory. Different apparatuses or measurement methods influenced the measurement of lens geometrical parameters.
研究调节对人晶状体几何参数的影响。
检索了从建库至2023年11月的8个数据库:中国知网、中国生物医学文献数据库、维普资讯网、万方数据、PubMed、科学引文索引、荷兰医学文摘数据库和考克兰图书馆。采用非随机研究方法学指标评估偏倚风险。遵循系统评价和Meta分析的首选报告项目(PRISMA),并考虑以下结果:晶状体直径(LD)、晶状体厚度(LT)、前曲率半径(ACR)、后曲率半径(PCR)、晶状体中心位置(LCP)和总横截面积(TCSA)。该系统评价已在国际注册系统评价和Meta分析平台(INPLASY202260085)上注册。
共纳入19项研究。调节时,LT以0.04 mm/D的速度增加(18项研究;95%置信区间[CI],0.03 - 0.06;I² = 96.6%;P < 0.001)。同时,LD、ACR和PCR分别以0.06 mm/D(6项研究;95%CI, - 0.07 - 0.05;I² = 50.1%;P < 0.001)、0.53 mm/D(8项研究;95%CI, - 0.64 - 0.41;I² = 96.5%;P < 0.001)和0.14 mm/D(9项研究;95%CI, - 0.19 - 0.09;I² = 94.7%;P < 0.001)的速度减小。此外,调节时LCP向前移动0.01 mm/D(3项研究;95%CI, - 0.02 - 0.00;I² = 0.0%;P < 0.001),TCSA以0.58 mm/D的速度增加(2项研究;95%CI,0.41 - 1.57;I² = 97.0%;P = 0.457)。
LT、LD、ACR、PCR和LCP的变化支持了亥姆霍兹理论。不同的仪器或测量方法会影响晶状体几何参数的测量。