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Article: Does the surface property of a disposable applanation tonometer account for its underestimation of intraocular pressure when compared with the Goldmann tonometer?

TitleDoes the surface property of a disposable applanation tonometer account for its underestimation of intraocular pressure when compared with the Goldmann tonometer?
Authors
KeywordsApplanation
Disposable tonometer
Goldmann
Tonojet
Issue Date2007
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00417/index.htm
Citation
Graefe's Archive For Clinical And Experimental Ophthalmology, 2007, v. 245 n. 4, p. 555-559 How to Cite?
AbstractBackground: Disposable tonometers are increasingly being adopted partly because of concerns over the transmission of variant Creutzfeldt-Jakob disease and partly for convenience. Recently, we have found one such tonometer (Tonojet by Luneau Ophthalmologie, France) underestimated the intraocular pressure (IOP). Methods: We hypothesized that this underestimation was caused by a difference in the surface property of the tonometers. A tensiometer was used to measure the suction force resulting from interfacial tension between a solution of lignocaine and fluorescein and the tonometers. Results: The results showed that the suction force was significantly greater for the Goldmann compared to the Tonojet. Conclusions: The magnitude of this force was too small to account for the difference in IOP measurements. The Tonojet was less hydrophilic than the Goldmann, and the contact angle of the fluid was therefore greater. For a given tear film, less hydrophilic tonometers will tend to have thicker mires, and this may lead to underestimation of the IOP. When such disposable tonometers are used, it is recommended care should be taken to reject readings from thick mires. © Springer-Verlag 2006.
Persistent Identifierhttp://hdl.handle.net/10722/90354
ISSN
2015 Impact Factor: 1.991
2015 SCImago Journal Rankings: 1.217
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorOsborne, SFen_HK
dc.contributor.authorWilliams, Ren_HK
dc.contributor.authorBatterbury, Men_HK
dc.contributor.authorWong, Den_HK
dc.date.accessioned2010-09-06T10:09:13Z-
dc.date.available2010-09-06T10:09:13Z-
dc.date.issued2007en_HK
dc.identifier.citationGraefe's Archive For Clinical And Experimental Ophthalmology, 2007, v. 245 n. 4, p. 555-559en_HK
dc.identifier.issn0721-832Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/90354-
dc.description.abstractBackground: Disposable tonometers are increasingly being adopted partly because of concerns over the transmission of variant Creutzfeldt-Jakob disease and partly for convenience. Recently, we have found one such tonometer (Tonojet by Luneau Ophthalmologie, France) underestimated the intraocular pressure (IOP). Methods: We hypothesized that this underestimation was caused by a difference in the surface property of the tonometers. A tensiometer was used to measure the suction force resulting from interfacial tension between a solution of lignocaine and fluorescein and the tonometers. Results: The results showed that the suction force was significantly greater for the Goldmann compared to the Tonojet. Conclusions: The magnitude of this force was too small to account for the difference in IOP measurements. The Tonojet was less hydrophilic than the Goldmann, and the contact angle of the fluid was therefore greater. For a given tear film, less hydrophilic tonometers will tend to have thicker mires, and this may lead to underestimation of the IOP. When such disposable tonometers are used, it is recommended care should be taken to reject readings from thick mires. © Springer-Verlag 2006.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00417/index.htmen_HK
dc.relation.ispartofGraefe's Archive for Clinical and Experimental Ophthalmologyen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectApplanationen_HK
dc.subjectDisposable tonometeren_HK
dc.subjectGoldmannen_HK
dc.subjectTonojeten_HK
dc.subject.meshDiagnostic Errors-
dc.subject.meshDisposable Equipment-
dc.subject.meshIntraocular Pressure - physiology-
dc.subject.meshReproducibility of Results-
dc.subject.meshTonometry, Ocular - instrumentation-
dc.titleDoes the surface property of a disposable applanation tonometer account for its underestimation of intraocular pressure when compared with the Goldmann tonometer?en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0721-832X&volume=245&issue=4&spage=555&epage=559&date=2007&atitle=Does+the+surface+property+of+a+disposable+applanation+tonometer+account+for+its+underestimation+of+intraocular+pressure+when+compared+with+the+Goldmann+tonometer?en_HK
dc.identifier.emailWong, D: shdwong@hku.hken_HK
dc.identifier.authorityWong, D=rp00516en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00417-006-0380-9en_HK
dc.identifier.pmid16912886-
dc.identifier.scopuseid_2-s2.0-33947587080en_HK
dc.identifier.hkuros136217en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33947587080&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume245en_HK
dc.identifier.issue4en_HK
dc.identifier.spage555en_HK
dc.identifier.epage559en_HK
dc.identifier.isiWOS:000246153900009-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridOsborne, SF=7102780299en_HK
dc.identifier.scopusauthoridWilliams, R=10042153900en_HK
dc.identifier.scopusauthoridBatterbury, M=35513013200en_HK
dc.identifier.scopusauthoridWong, D=7401536078en_HK
dc.identifier.citeulike1238078-

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