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Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions
PURPOSE: To investigate the reliability of ocular aberration measurement in myopic children under scotopic conditions and to validate the mathematical Zernike pupil scaling-down technique. METHODS: Ocular aberrations of 45 myopic children were examined under scotopic conditions via iTrace aberromete...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5828559/ https://www.ncbi.nlm.nih.gov/pubmed/29607213 http://dx.doi.org/10.1155/2018/2043718 |
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author | Li, Zhouyue Cui, Dongmei Ao, Sichun Lan, Weizhong Yang, Xiao |
author_facet | Li, Zhouyue Cui, Dongmei Ao, Sichun Lan, Weizhong Yang, Xiao |
author_sort | Li, Zhouyue |
collection | PubMed |
description | PURPOSE: To investigate the reliability of ocular aberration measurement in myopic children under scotopic conditions and to validate the mathematical Zernike pupil scaling-down technique. METHODS: Ocular aberrations of 45 myopic children were examined under scotopic conditions via iTrace aberrometer. The intra- and intersession repeatability was evaluated for both the measured values with the true pupil sizes and the estimated ones that were determined by scaling down the pupil sizes to the largest integer value across all measurements. RESULTS: The intra- and intersession difference of clinically measured aberration was generally insignificant, and the ICCs for each aberration component exhibited good to excellent reliability (ICCs > 0.4). Similar results were found for the estimated aberration using the scaling-down technique. Although the majority of the estimated Zernike components were comparable with the corresponding measured one, the estimated values of defocus, coma, and the corresponding total aberrations were found significantly smaller than the measured values (all P < 0.01). CONCLUSIONS: The ocular aberration measurements in myopic children under the circumstances described are reliable. The scaling-down technique is a useful option for comparing the results obtained from different pupil sizes, but the estimated Zernike coefficients were not always comparable with the corresponding measured values. |
format | Online Article Text |
id | pubmed-5828559 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
spelling | pubmed-58285592018-04-01 Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions Li, Zhouyue Cui, Dongmei Ao, Sichun Lan, Weizhong Yang, Xiao J Ophthalmol Research Article PURPOSE: To investigate the reliability of ocular aberration measurement in myopic children under scotopic conditions and to validate the mathematical Zernike pupil scaling-down technique. METHODS: Ocular aberrations of 45 myopic children were examined under scotopic conditions via iTrace aberrometer. The intra- and intersession repeatability was evaluated for both the measured values with the true pupil sizes and the estimated ones that were determined by scaling down the pupil sizes to the largest integer value across all measurements. RESULTS: The intra- and intersession difference of clinically measured aberration was generally insignificant, and the ICCs for each aberration component exhibited good to excellent reliability (ICCs > 0.4). Similar results were found for the estimated aberration using the scaling-down technique. Although the majority of the estimated Zernike components were comparable with the corresponding measured one, the estimated values of defocus, coma, and the corresponding total aberrations were found significantly smaller than the measured values (all P < 0.01). CONCLUSIONS: The ocular aberration measurements in myopic children under the circumstances described are reliable. The scaling-down technique is a useful option for comparing the results obtained from different pupil sizes, but the estimated Zernike coefficients were not always comparable with the corresponding measured values. Hindawi 2018-02-11 /pmc/articles/PMC5828559/ /pubmed/29607213 http://dx.doi.org/10.1155/2018/2043718 Text en Copyright © 2018 Zhouyue Li et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Li, Zhouyue Cui, Dongmei Ao, Sichun Lan, Weizhong Yang, Xiao Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions |
title | Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions |
title_full | Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions |
title_fullStr | Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions |
title_full_unstemmed | Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions |
title_short | Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions |
title_sort | reliability of ocular aberration measurements in children with moderate and low myopia under scotopic conditions |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5828559/ https://www.ncbi.nlm.nih.gov/pubmed/29607213 http://dx.doi.org/10.1155/2018/2043718 |
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