Comparison of Luneau SA disposable and Goldmann applanation tonometer readings

Eye
A C J BaddonD Wong

Abstract

To test the agreement of intraocular pressure (IOP) measurements made with Luneau SA applanators and Goldmann applanator. A single-blind crossover trial. IOPs were measured in both eyes of subjects with both applanators. Type of applanator was alternated to eliminate systematic bias. Multiple observers were used. Observers were blind to the scale while performing measurements but not to the type of applanator used. The appearance of the meniscus was assessed semiquantitatively. All measurements were combined and presented in a Bland-Altman plot. A total of 140 eyes of 79 subjects were tested by seven observers. The range of measurements was 6-45 mmHg (mean 17.8 mmHg) for the Goldmann applanator. On average, the Luneau SA applanator (range of measurements 4-36 mmHg) gave a measurement of 2.35 mmHg less than the Goldmann standard. The standard deviation of these differences was 2.13 mmHg, giving an upper 95% confidence limit of 6.53 mmHg and a lower 95% confidence limit of -1.83 mmHg. The measurements agreed in only 24 out of 140 instances. In 28 eyes, the disposable tonometer end point was difficult to assess owing to excessively thick rings. Linear extrapolation suggests an increase in difference with increasing IOP. The inter-...Continue Reading

References

Jun 9, 1977·The New England Journal of Medicine·E E ManuelidisL Manuelidis
Dec 1, 1979·Experimental Eye Research·L J Viernstein, I P Pollack
Jul 1, 1993·Survey of Ophthalmology·M M Whitacre, R Stein
Apr 26, 2003·The British Journal of Ophthalmology·R LimJ W Ironside
Sep 2, 2005·Clinical Evidence·Rajiv Shah, Richard Wormald

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Citations

Aug 17, 2006·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Sarah F OsborneDavid Wong
Nov 26, 2008·Survey of Ophthalmology·Christoph KniestedtRobert L Stamper

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