The effect of pterygium on corneal astigmatism.

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dc.contributor.authorKampitak, Kosolen_US
dc.date.accessioned2009-05-27T18:49:11Z
dc.date.available2009-05-27T18:49:11Z
dc.date.issued2003-01-08en_US
dc.descriptionChotmaihet Thangphaet.en_US
dc.description.abstractOBJECTIVE: To determine the effect of pterygium on corneal astigmatism. METHOD: Two hundred and forty three eyes of 173 patients with primary pterygium were included in the present study. The extension of pterygium was measured by slit lamp and corneal astigmatism was measured by corneal topography. Correlation of the data was discussed. RESULTS: The size of pterygium extended from 0.50 mm to 8.10 mm (2.11 +/- 1.10). The diopter of corneal astigmatism ranged from 0.10 diopter to 14.60 diopter (1.86 +/- 2.39). The axis of corneal astigmatism was found in vertical axis 156 eyes (64.2%), oblique axis 36 eyes (14.8%) and horizontal axis 51 eyes (21.0%). The degree of corneal astigmatism significantly correlated with the extension of pterygium on the cornea (R Square = 0.45, p < 0.001). When the extension of pterygium exceeded 2.25 mm, there was a chance of developing corneal astigmatism of 2 diopter or more (86.21% of sensitivity and 80% of specificity). CONCLUSION: The extension of pterygium is significantly correlated with the degree of corneal astigmatism in the positive direction, with the highest percentage of with-the-rule astigmatism. Pterygium exceeding 2.25 mm of length should be considered within the limits of surgery.en_US
dc.description.affiliationOphthalmology Division, Department of Clinical Science, Faculty of Medicine, Thammasat University, Rangsit Campus, Pathum Thani 12120, Thailand.en_US
dc.identifier.citationKampitak K. The effect of pterygium on corneal astigmatism. Journal of the Medical Association of Thailand. 2003 Jan; 86(1): 16-23en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/39913
dc.language.isoengen_US
dc.source.urihttps://www.mat.or.th/journal/all.phpen_US
dc.subject.meshAdulten_US
dc.subject.meshAge Distributionen_US
dc.subject.meshAgeden_US
dc.subject.meshAged, 80 and overen_US
dc.subject.meshAstigmatism --diagnosisen_US
dc.subject.meshCohort Studiesen_US
dc.subject.meshComorbidityen_US
dc.subject.meshCorneal Topographyen_US
dc.subject.meshFemaleen_US
dc.subject.meshHumansen_US
dc.subject.meshIncidenceen_US
dc.subject.meshMaleen_US
dc.subject.meshMiddle Ageden_US
dc.subject.meshProbabilityen_US
dc.subject.meshProspective Studiesen_US
dc.subject.meshPterygium --diagnosisen_US
dc.subject.meshROC Curveen_US
dc.subject.meshRisk Assessmenten_US
dc.subject.meshSensitivity and Specificityen_US
dc.subject.meshSeverity of Illness Indexen_US
dc.subject.meshSex Distributionen_US
dc.subject.meshThailand --epidemiologyen_US
dc.titleThe effect of pterygium on corneal astigmatism.en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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