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dc.contributor.authorGispets Parcerisas, Joan
dc.contributor.authorCardona Torradeflot, Genís
dc.contributor.authorVerdú, Miriam
dc.contributor.authorTomás Corominas, Núria
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Òptica i Optometria
dc.date.accessioned2014-04-10T08:23:05Z
dc.date.available2014-04-10T08:23:05Z
dc.date.created2014-03-01
dc.date.issued2014-03-01
dc.identifier.citationGispets, J. [et al.]. Sources of variability of the van Herick technique for anterior angle estimation. "Clinical and experimental optometry", 01 Març 2014, vol. 97, núm. 2, p. 147-151.
dc.identifier.issn0816-4622
dc.identifier.urihttp://hdl.handle.net/2117/22600
dc.description.abstractBackgroundThe purpose of the present study was to investigate two potential sources of variability of the traditional van Herick technique for temporal anterior chamber angle estimation, namely the need to compare the depth of the peripheral anterior chamber (PACD) with the thickness of the peripheral cornea (PCT), and the possible loss of information resulting from restricting the assessment of the anterior chamber angle (ACA) to the temporal limbus.; MethodsBoth image analysis and Scheimpflug photography were employed to measure PCT and PACD in a group of 82 eyes (mean SD age of 32.8 4.1 years) with and without narrow anterior chamber angles. Subjective and semi-objective van Herick grades were compared and the relationship between PCT and PACD was investigated. Scheimpflug photography was also used to determine the value of the narrowest anterior chamber angle and to compare it with the temporal angle.; ResultsNo statistically significant differences were encountered between semi-objective and subjective grades. A weak statistically significant correlation was found between image analysis values for PCT and PACD (r = 0.295; p = 0.007). Upon examining Scheimpflug photographic data, no statistically significant association between PCT and PACD was revealed. Temporal and minimum anterior chamber angles presented statistically significant differences (t = 7.213; p < 0.001). In approximately 65 per cent of the patients, the minimum ACA was not located at the temporal limbus, with a difference of up to 9.8 degrees between minimum and temporal angles.; ConclusionThe encountered association between the image analyses of PCT and PACD advocates for the direct measurement of PACD as a better estimation of ACA depth than the ratio between PCT and PACD. All anterior chamber quadrants should be examined, as the minimum ACA may not be located temporally.
dc.format.extent5 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Ciències de la salut::Medicina::Oftalmologia
dc.subjectÀrees temàtiques de la UPC::Ciències de la visió
dc.subject.lcshAngle-closure glaucoma
dc.subject.lcshAnterior chamber (Eye)
dc.subject.lcshGonioscopy
dc.subject.lcshCornea
dc.subject.otherangle closure
dc.subject.otheranterior chamber angle
dc.subject.othergonioscopy
dc.subject.otherlimbal chamber depth
dc.subject.otherScheimpflug photography
dc.subject.othervan Herick technique
dc.subject.otherOPTICAL COHERENCE TOMOGRAPHY
dc.subject.otherCONTACT-LENS COMPLICATIONS
dc.subject.otherCHAMBER DEPTH
dc.subject.otherOCCLUDABLE ANGLES
dc.subject.otherULTRASOUND BIOMICROSCOPY
dc.subject.otherCLOSURE GLAUCOMA
dc.subject.otherPENTACAM
dc.subject.otherSYSTEM
dc.subject.otherREPEATABILITY
dc.subject.otherKNOWLEDGE
dc.titleSources of variability of the van Herick technique for anterior angle estimation
dc.typeArticle
dc.subject.lemacCòrnia
dc.subject.lemacGlaucoma
dc.subject.lemacLents intraoculars
dc.contributor.groupUniversitat Politècnica de Catalunya. GRCUV - Grup de Recerca del Centre Universitari de la Visió
dc.contributor.groupUniversitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica
dc.identifier.doi10.1111/cxo.12094
dc.relation.publisherversionhttp://onlinelibrary.wiley.com/doi/10.1111/cxo.12094/abstract
dc.rights.accessOpen Access
drac.iddocument13064449
dc.description.versionPreprint
upcommons.citation.authorGispets, J.; Cardona, G.; Verdú, M.; Tomas, N.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameClinical and experimental optometry
upcommons.citation.volume97
upcommons.citation.number2
upcommons.citation.startingPage147
upcommons.citation.endingPage151


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