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Variability of fusion vergence measurements in heterophoria

2016-04Artigo científico Acesso restrito
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dc.contributor.authorLança, Carla
dc.contributor.authorRowe, Fiona J.
dc.date.accessioned2016-12-22T11:07:49Z
dc.date.available2016-12-22T11:07:49Z
dc.date.issued2016-04
dc.description.abstractPurpose: The aims of this study were to compare fusional vergence measurements between orthophoria, esophoria, and exophoria, and to determine the strength of correlations between fusional convergence and divergence and angle of deviation. Methods and materials: A cross-sectional study was performed in children with best-corrected visual acuity of 0.0 LogMAR in either eye, compensated heterophoria within 10 prism diopters (PD), full ocular rotations, presence of fusional vergence, and stereopsis (60 seconds of arc or better). Fusional amplitudes were compared between orthophoric and heterophoric children. The fusion reserve ratio was determined as compensating vergence divided by alternating cover test. Results: Five hundred and thirty children (7.66±1.20 years) were recruited to this study. The most common heterophoria was exophoria (n=181, 34.2% for near; n=20, 3.8% for distance). Exophoric children had significant lower mean positive fusional vergences (exophoria-orthophoria: P=0.003; exophoria-esophoria: P=0.035) for near (19.54±5.23 base-out) compared with children with orthophoria (20.48±4.83 base-out) and esophoria (22.27±5.60 base-out). Smaller convergence fusion amplitudes were associated with larger angles of deviation at near (rs=-0.115; P=0.008) and lower fusion reserve ratios were associated with larger angles of deviation at distance (rs=-0.848; P<0.001) and at near (rs=-0.770; P<0.001). Conclusions: Exophoric children have reduced convergence break points when compared with orthophoric and esophoric children. Vergence measurements, taking into consideration the baseline heterophoria, give important information about the ability of the patient to increase their vergence demand and maintain ocular alignment.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationLança CC, Rowe F. Variability of fusion vergence measurements in heterophoria. Strabismus. 2016;24(2):63-9.pt_PT
dc.identifier.doi10.3109/09273972.2016.1159234pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/6657
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.relation.publisherversionhttp://www.tandfonline.com/doi/abs/10.3109/09273972.2016.1159234?journalCode=istr20pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectOrthopticspt_PT
dc.subjectEsophoriapt_PT
dc.subjectExophoriapt_PT
dc.subjectFusionpt_PT
dc.subjectFusion reserve ratiopt_PT
dc.subjectVergencept_PT
dc.subjectHeterophoriapt_PT
dc.subjectChildrenpt_PT
dc.titleVariability of fusion vergence measurements in heterophoriapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage69pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage63pt_PT
oaire.citation.titleStrabismuspt_PT
oaire.citation.volume24pt_PT
person.familyNameLança
person.givenNameCarla
person.identifier.ciencia-id601A-6412-BF2F
person.identifier.orcid0000-0001-9918-787X
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0320b455-ee19-4670-8bf2-10dce9de1bec
relation.isAuthorOfPublication.latestForDiscovery0320b455-ee19-4670-8bf2-10dce9de1bec

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