Does convergence, not accommodation, cause axial-length elongation at near?: A biometric study in teens

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dc.authorid, osman/0000-0003-0911-8649
dc.authoridBayramlar, Huseyin/0000-0002-8118-1151
dc.authorwosid, osman/H-3027-2019
dc.authorwosidBayramlar, Huseyin/I-5876-2013
dc.contributor.authorBayramlar, H
dc.contributor.authorÇekiç, O
dc.contributor.authorHepsen, IF
dc.date.accessioned2024-08-04T20:12:02Z
dc.date.available2024-08-04T20:12:02Z
dc.date.issued1999
dc.departmentİnönü Üniversitesien_US
dc.description.abstractTo determine whether convergence rather than accommodation has a primary effect on the changes in axial length and other biometric components during near fixation, we measured the anterior chamber depth, lens thickness, vitreous length and axial length in the right eyes of 124 young male subjects while their left eyes focused at distance (6 m) and near (20 cm). The measurements were performed before and after cycloplegia in the right eye, so we aimed to study biometric components of the eye in the states of ac-commodation and nonaccommodation, but converging at near. While the left eye focused at near, the axial length increased significantly with and without cycloplegia (p < 0.0005 and p < 0.0005). The vitreous length was the main increasing ocular biometric component at near both with and without cycloplegia (p < 0.044 and p = 0.001, respectively). At near, there was no difference between two mean axial length and two vitreous length measurements both with and without cycloplegia (p = 0.672 and p = 0.595, respectively), Under cycloplegia, anterior chamber depth also increased significantly at near fixation (p = 0.012). Axial elongation at near fixation, mainly due to an increase in vitreous length, may result from the effect of accommodative convergence rather than accommodation itself. Much use of convergence, not accommodation, may be one of the contributing factors in adult onset and adult progression of myopia.en_US
dc.identifier.doi10.1159/000055551
dc.identifier.endpage308en_US
dc.identifier.issn0030-3747
dc.identifier.issue4en_US
dc.identifier.pmid10325546en_US
dc.identifier.scopus2-s2.0-0033023795en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage304en_US
dc.identifier.urihttps://doi.org/10.1159/000055551
dc.identifier.urihttps://hdl.handle.net/11616/93177
dc.identifier.volume31en_US
dc.identifier.wosWOS:000080743000008en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherKargeren_US
dc.relation.ispartofOphthalmic Researchen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectmyopiaen_US
dc.subjectconvergenceen_US
dc.subjectaccommodationen_US
dc.subjectaxial lengthen_US
dc.subjectvitreous lengthen_US
dc.titleDoes convergence, not accommodation, cause axial-length elongation at near?: A biometric study in teensen_US
dc.typeArticleen_US

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