Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/109303
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dc.contributorSchool of Optometry-
dc.creatorGuo, B-
dc.creatorCheung, SW-
dc.creatorKojima, R-
dc.creatorCho, P-
dc.date.accessioned2024-10-03T08:17:48Z-
dc.date.available2024-10-03T08:17:48Z-
dc.identifier.issn0275-5408-
dc.identifier.urihttp://hdl.handle.net/10397/109303-
dc.language.isoenen_US
dc.publisherWiley-Blackwell Publishing Ltd.en_US
dc.rights© 2023 The Authors. Ophthalmic and Physiological Optics published by John Wiley & Sons Ltd on behalf of College of Optometrists.en_US
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.rightsThe following publication Guo B, Cheung SW, Kojima R, Cho P. Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study: A 2-year randomised clinical trial. Ophthalmic Physiol Opt. 2023; 43: 1449–1461 is available at https://doi.org/10.1111/opo.13208.en_US
dc.subjectAxial elongationen_US
dc.subjectBack optic zone diameteren_US
dc.subjectMyopia controlen_US
dc.subjectOrthokeratologyen_US
dc.subjectTreatment zoneen_US
dc.titleVariation of Orthokeratology Lens Treatment Zone (VOLTZ) Study : a 2-year randomised clinical trialen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1449-
dc.identifier.epage1461-
dc.identifier.volume43-
dc.identifier.issue6-
dc.identifier.doi10.1111/opo.13208-
dcterms.abstractPurpose: To compare axial elongation (AE) and treatment zone (TZ) characteristics in children wearing 6 mm or 5 mm back optic zone diameter (BOZD) orthokeratology (ortho-k) lenses over 2 years.-
dcterms.abstractMethods: Forty-five (6 to <11 years of age) myopic (−4.00 to −0.75 D) children of Chinese ethnicity were randomly assigned to use the two different lens designs (23 and 22 wore the 6 and 5 mm lenses, respectively). Data collection was performed at baseline and every 6-months after commencing lens wear.-
dcterms.abstractResults: After 24 months, subjects wearing lenses with a 5 mm BOZD achieved smaller TZ diameter (horizontal: 2.69 ± 0.28 vs. 3.84 ± 0.39 mm; vertical: 2.65 ± 0.22 vs. 3.42 ± 0.34 mm, p < 0.001) and less AE (0.15 ± 0.21 vs. 0.35 ± 0.23, p = 0.005) compared to those using the 6 mm design, with no difference in choroidal thickness (ChT) changes (p = 0.93). A significant increase in ChT, using pooled data analysis, was noted at the 6-month (11.8 ± 19.77 μm, p < 0.001) and 12-month (12.0 ± 23.7 μm, p = 0.004) visits, compared to baseline, indicating a transient change in ChT. Significant associations were noted, using linear mixed models, between AE and the TZ diameters (p < 0.003) after adjusting for baseline data. A very weak association was found between ChT changes and AE, with the effect size close to zero.-
dcterms.abstractConclusions: Smaller BOZD ortho-k lenses resulted in a smaller TZ diameter, which was associated with less AE after 2 years of treatment. The changes in ChT played a very weak role, suggesting that other factors may contribute more to the reduced AE in subjects wearing lenses having a smaller BOZD.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationOphthalmic and physiological optics, Nov. 2023, v. 43, no. 6, p. 1449-1461-
dcterms.isPartOfOphthalmic and physiological optics-
dcterms.issued2023-11-
dc.identifier.scopus2-s2.0-85167349397-
dc.identifier.eissn1475-1313-
dc.description.validate202410 bcch-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_Scopus/WOSen_US
dc.description.fundingSourceOthersen_US
dc.description.fundingTextResearch Residency Scheme of The Hong Kong Polytechnic Universityen_US
dc.description.pubStatusPublisheden_US
dc.description.oaCategoryCCen_US
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