{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T18:02:44Z","timestamp":1788631364695,"version":"build-2803163510"},"reference-count":44,"publisher":"Wiley","license":[{"start":{"date-parts":[[2018,10,15]],"date-time":"2018-10-15T00:00:00Z","timestamp":1539561600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Zhejiang Provincial Foundation of China","award":["2010QNA018"],"award-info":[{"award-number":["2010QNA018"]}]},{"name":"Zhejiang Provincial Foundation of China","award":["LY14H120007"],"award-info":[{"award-number":["LY14H120007"]}]},{"DOI":"10.13039\/501100004731","name":"Natural Science Foundation of Zhejiang Province","doi-asserted-by":"publisher","award":["2010QNA018"],"award-info":[{"award-number":["2010QNA018"]}],"id":[{"id":"10.13039\/501100004731","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004731","name":"Natural Science Foundation of Zhejiang Province","doi-asserted-by":"publisher","award":["LY14H120007"],"award-info":[{"award-number":["LY14H120007"]}],"id":[{"id":"10.13039\/501100004731","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Ophthalmology"],"published-print":{"date-parts":[[2018,10,15]]},"abstract":"<jats:p><jats:italic>Purpose<\/jats:italic>. To assess the changes and the diurnal variation of visual quality after orthokeratology in myopic children.<jats:italic>Methods.<\/jats:italic>Forty-four eyes of 22 subjects with a mean age of 10.55 \u00b1 1.53\u2009years (8 to 14\u2009years) were enrolled in this prospective study. Their spherical equivalent ranged from \u22121.25 to \u22124.25\u2009diopters (D) and astigmatism was less than 1.00\u2009D. Parameters including corneal curvature, ocular objective scatter index (OSI), the modulation transfer function (MTF), root mean square of ocular and corneal wavefront aberrations, and contrast sensitivity function (CSF) were measured before and at two time points during the same day after 1\u2009month of orthokeratology.<jats:italic>Results<\/jats:italic>. After orthokeratology, uncorrected visual acuity (UCVA) and spherical equivalent were significantly improved from baseline (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.001<\/mml:mn><\/mml:mrow><\/mml:math>), and their diurnal variation was not significant (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.083<\/mml:mn><mml:mo>,<\/mml:mo><mml:mn>0.568<\/mml:mn><\/mml:mrow><\/mml:math>). OSI increased from 0.29 \u00b1 0.15 to 0.65 \u00b1 0.31 (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M3\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.001<\/mml:mn><\/mml:mrow><\/mml:math>). MTF decreased significantly (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M4\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.01<\/mml:mn><\/mml:mrow><\/mml:math>). Corneal curvature and ocular total aberration decreased (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M5\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.001<\/mml:mn><\/mml:mrow><\/mml:math>), while the ocular and corneal higher-order aberration increased significantly (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M6\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.01<\/mml:mn><\/mml:mrow><\/mml:math>). The CSF under photopic condition decreased at 3\u2009cpd (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M7\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.006<\/mml:mn><\/mml:mrow><\/mml:math>) and increased at 18\u2009cpd (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M8\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.012<\/mml:mn><\/mml:mrow><\/mml:math>). The diurnal variation of CSF at 18\u2009cpd under mesopic and high glare conditions and at 12\u2009cpd under photopic condition was significant (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M9\"><mml:mrow><mml:mi>P<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.002<\/mml:mn><mml:mo>,<\/mml:mo><mml:mn>0.01<\/mml:mn><mml:mo>,<\/mml:mo><mml:mn>0.017<\/mml:mn><\/mml:mrow><\/mml:math>).<jats:italic>Conclusions<\/jats:italic>. Orthokeratology can effectively improve UCVA and high spatial frequency CSF by decreasing the low-order aberrations. However, MTF and CSF at low spatial frequency decreased because of the increase of intraocular scattering and high-order aberrations. Meanwhile, CSF at high spatial frequency fluctuates significantly at two times during the same day after 1\u2009month orthokeratology.<\/jats:p>","DOI":"10.1155\/2018\/3174826","type":"journal-article","created":{"date-parts":[[2018,10,15]],"date-time":"2018-10-15T23:30:46Z","timestamp":1539646246000},"page":"1-10","source":"Crossref","is-referenced-by-count":15,"title":["Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6142-7954","authenticated-orcid":true,"given":"Hao-Chen","family":"Guo","sequence":"first","affiliation":[{"name":"The Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1764-2785","authenticated-orcid":true,"given":"Wan-Qing","family":"Jin","sequence":"additional","affiliation":[{"name":"The Eye Hospital of Wenzhou Medical 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