Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30743
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dc.contributorSchool of Optometryen_US
dc.creatorLeung, TWen_US
dc.creatorLam, AKCen_US
dc.creatorKee, CSen_US
dc.date.accessioned2015-10-13T08:28:03Z-
dc.date.available2015-10-13T08:28:03Z-
dc.identifier.issn1040-5488en_US
dc.identifier.urihttp://hdl.handle.net/10397/30743-
dc.language.isoenen_US
dc.publisherLippincott Williams & Wilkinsen_US
dc.rightsCopyright © 2015 American Academy of Optometryen_US
dc.rightsThis is a non-final version of an article published in final form in Optometry and Vision Science: May 2015 - Volume 92 - Issue 5 - p 604-614. The Optometry and Vision Science's website is available at https://journals.lww.com/optvissci/pages/default.aspxen_US
dc.subjectAberrationsen_US
dc.subjectAstigmatismen_US
dc.subjectCorneal shapeen_US
dc.subjectMyopiaen_US
dc.subjectRefractive errorsen_US
dc.titleOcular aberrations and corneal shape in adults with and without astigmatismen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage604en_US
dc.identifier.epage614en_US
dc.identifier.volume92en_US
dc.identifier.issue5en_US
dc.identifier.doi10.1097/OPX.0000000000000581en_US
dcterms.abstractPurpose. To characterize and compare the corneal shapes and monochromatic aberrations in Chinese myopic adults with and without astigmatism. Methods. Forty-six Hong Kong Chinese aged 50 to 70 years with compound against-the-rule myopic astigmatism (n = 18) or simple myopia (n = 28) were recruited. Corneal shapes were measured by a Scheimpflug-based corneal topographer: the semimeridian corneal shape factors at the nasal, temporal, inferior, and superior corneal quadrants measured from the corneal apex to 3 mm midperiphery were analyzed. The ocular aberrations were measured by the COAS (Complete Ophthalmic Analysis System) Shack-Hartmann wavefront aberrometer; the corneal aberrations were computed using the corneal topographic map data measured by the Medmont E300 corneal topographer; and the internal aberrations were calculated from the ocular and corneal aberrations. Results. Compared with simple myopia, myopic astigmatism had more oblate nasal and temporal corneal shapes and showed significantly more negative Y trefoil and more positive vertical coma. The asymmetry in corneal shape along the vertical principal meridian (inferior j superior) was significantly associated with the Y trefoil and vertical coma of the cornea, suggesting that this regional asymmetry in corneal shape may contribute to the ocular aberrations. Conclusions. The significant relationships found between astigmatism, corneal shapes, and monochromatic aberrations underscore the importance of taking corneal shape into account when correcting the optical defects in myopic Chinese adults with astigmatism.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationOptometry and vision science, May 2015, v. 92, no. 5, p. 604-614en_US
dcterms.isPartOfOptometry and vision scienceen_US
dcterms.issued2015-05-
dc.identifier.scopus2-s2.0-84929498035-
dc.identifier.pmid25875686-
dc.identifier.eissn1538-9235en_US
dc.identifier.rosgroupid2014000467-
dc.description.ros2014-2015 > Academic research: refereed > Publication in refereed journalen_US
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumbera0815-n04-
dc.identifier.SubFormID1831-
dc.description.fundingSourceRGCen_US
dc.description.fundingSourceOthersen_US
dc.description.fundingText561209, A-PC0Uen_US
dc.description.fundingTextJ-BB7Pen_US
dc.description.pubStatusPublisheden_US
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