Mirzajani Ali, Heirani Mohsen, Jafarzadehpur Ebrahim, Haghani Hamid
Optometry Department, Tehran University of Medical Sciences, Tehran, Iran.
Clin Exp Optom. 2013 Jul;96(4):394-9. doi: 10.1111/cxo.12063. Epub 2013 May 17.
The aim was to compare outcome measures of refractive error by the Plusoptix S08 photorefractor with measures obtained by retinoscopy and cycloretinoscopy in children.
The refractive error of the right eye of 144 non-strabismic children, aged 2.5 to 5.5 years, was determined by Plusoptix S08 photorefraction, retinoscopy and cycloretinoscopy. Agreement between outcome measures of refractive error (spherical error, cylindrical error and spherical equivalent) by the three techniques were tested by Bland-Altman limits of agreement.
The mean difference for spherical equivalent results of photorefraction (P(se)) minus those of retinoscopy (R(se)) and photorefraction minus those of cycloretinoscopy (CR(se)) were +0.53 ± 0.62 D and -0.22 ± 0.75 D, respectively. The 95 per cent limits of agreement for spherical photorefraction with retinoscopy and cycloretinoscopy were ±1.22 D (range -0.69 to +1.75) and ±1.47 D (range -1.69 to +1.25), respectively. The mean difference for cylindrical results of photorefraction (P(c)) minus those of retinoscopy (R(c)) and Pc minus those of cycloretinoscopy (CR(c)) were +0.11 ± 0.39 D and +0.13 ± 0.44 D, respectively. The 95 per cent limits of agreement for P(c) with R(c) and CR(c) were ±0.76 D (range -0.65 to +0.87) and ±0.86 D (range -0.73 to +0.99), respectively. The mean and standard deviation of weighted axes difference, comparing Plusoptix S08 and retinoscopy was 0.25 ± 0.36 and comparing Plusoptix S08 and cycloretinoscopy was 0.29 ± 0.51. Eighty-two per cent of the spherical equivalent findings in photorefraction and cycloretinoscopy show a difference of within 1.00 D. Regarding cylindrical power, this percentage is 96.6 per cent.
As the findings demonstrate a fairly good consistency between the results of the Plusoptix S08 Photorefractor without using cycloplegic agents and those of cycloretinoscopy, the Plusoptix S08 is a fairly accurate tool to estimate refractive errors of children in the limited working range of the instrument.
目的是比较Plusoptix S08验光仪测量儿童屈光不正的结果与检影验光和旋转检影验光的测量结果。
采用Plusoptix S08验光、检影验光和旋转检影验光法，对144例年龄在2.5至5.5岁的非斜视儿童的右眼屈光不正进行测定。通过Bland-Altman一致性界限检验三种技术测量屈光不正（球镜度数、柱镜度数和等效球镜度数）结果之间的一致性。
验光（P(se)）与检影验光（R(se)）等效球镜度数结果的平均差值，以及验光与旋转检影验光（CR(se)）等效球镜度数结果的平均差值分别为+0.53±0.62D和-0.22±0.75D。验光与检影验光、旋转检影验光等效球镜度数的95%一致性界限分别为±1.22D（范围-0.69至+1.75）和±1.47D（范围-1.69至+1.25）。验光（P(c)）与检影验光（R(c)）柱镜度数结果的平均差值，以及P(c)与旋转检影验光（CR(c)）柱镜度数结果的平均差值分别为+0.11±0.39D和+0.13±0.44D。P(c)与R(c)、CR(c)柱镜度数的95%一致性界限分别为±0.76D（范围-0.65至+0.87）和±0.86D（范围-0.73至+0.99）。比较Plusoptix S08和检影验光加权轴位差值的均值和标准差为0.25±0.36，比较Plusoptix S08和旋转检影验光加权轴位差值的均值和标准差为0.29±0.51。验光和旋转检影验光中82%的等效球镜度数测量结果差值在1.00D以内。对于柱镜度数，该百分比为96.6%。
由于研究结果表明，在不使用睫状肌麻痹剂的情况下，Plusoptix S08验光仪的测量结果与旋转检影验光的结果具有相当好的一致性，因此在该仪器有限的工作范围内，Plusoptix S08是一种相当准确的估计儿童屈光不正的工具。
