May 2007
Volume 48, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2007
Intraocular Pressure Measurement Comparison Between Dynamic Contour Tonometry and Goldmann Applanation Tonometry Before and After a Water Drinking Test
Author Affiliations & Notes
  • G. Tapia Herrera
    Glaucoma, Instituto de Cirugia Ocular, San Jose, Costa Rica
  • D. Mena
    Glaucoma, Instituto de Cirugia Ocular, San Jose, Costa Rica
  • D. Flikier
    Glaucoma, Instituto de Cirugia Ocular, San Jose, Costa Rica
  • L. Wu
    Glaucoma, Instituto de Cirugia Ocular, San Jose, Costa Rica
  • Footnotes
    Commercial Relationships G. Tapia Herrera, None; D. Mena, None; D. Flikier, None; L. Wu, None.
  • Footnotes
    Support None.
Investigative Ophthalmology & Visual Science May 2007, Vol.48, 3936. doi:
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      G. Tapia Herrera, D. Mena, D. Flikier, L. Wu; Intraocular Pressure Measurement Comparison Between Dynamic Contour Tonometry and Goldmann Applanation Tonometry Before and After a Water Drinking Test. Invest. Ophthalmol. Vis. Sci. 2007;48(13):3936.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose:: To assess the correlation between Goldmann applanationtonometry (GAT) and dynamic contour tonometry (DCT) before and after the water drinking test (WDT) in healthy, ocular hypertensive andglaucomatous eyes when the central corneal thickness is taken intoaccount.

Methods:: Retrospective study of 76 eyes of 38 patients who underwent intraocular pressure measurement with the Pascal DCT (Ziemer Ophthalmic Systems AG, Switzerland) and GAT before and 45 minutes after a WDT. Central corneal thickness (CCT) and ocular pulse amplitude were also recorded for each eye.

Results:: There were 39 healthy eyes, 35 glaucomatous eyes and 2 ocular hypertensive eyes. The measured IOP was significantly higher after the WDT in both the GAT and DCT (p= 0.000). IOP measurements with GAT were statistically lower than the ones obtained by DCT before and after the WDT (p= 0.000). The mean difference was -5.40 mmHg before the WDT and -4.82 mmHg after the WDT. There were no statistically significant differences between the groups of eyes according to their CCT or their diagnosis . The ocular pulse amplitude was not significantly different before and after the WDT. although it showed a tendency to increase after the WDT in each of the groups of eyes.

Conclusions:: IOP measurements obtained with DCT are higher than the ones obtained by GAT. This relation is maintained after a WDT. The ocular pulse amplitude has a tendency to increase after a WDT.

Keywords: intraocular pressure • clinical (human) or epidemiologic studies: systems/equipment/techniques • outflow: trabecular meshwork 
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