Are Disposable Prisms an Adequate Alternative to Standard Goldmann Tonometry Prisms in Glaucoma Patients?

Maino, Anna; Morgan, L. H.; Hercules, Brian L.; Tullo, Andrew B.

doi:10.1016/j.ophtha.2006.05.031

Cited by 11 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Maino et al 22 initially reported no significant differences between Tonosafe and the standard reusable prism in a cohort of 72 clinical patients attending an emergency eye centre, but did not present agreement statistics and only compared mean IOP taken with each device. However, a further study of 332 eyes of 240 patients showed that the Tonosafe consistently under-read IOP when compared with the reusable prism (mean difference 1.10 mm Hg, 95% LoA not specified) when measured by a single observer 23. Our study comparing different groups of observers, from a pool of clinicians who routinely measure IOP, showed similar agreement levels between the reusable and Tonosafe disposable prisms compared with the above reports.…”

Section: Discussionsupporting

confidence: 73%

Applanation tonometry: interobserver and prism agreement using the reusable Goldmann applanation prism and the Tonosafe disposable prism

et al. 2015

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 73%

Applanation tonometry: interobserver and prism agreement using the reusable Goldmann applanation prism and the Tonosafe disposable prism

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Tsai et al, 30 also, when comparing the traditional cone with TonoSafe®, reported bias agreement of Bland-Altman = 0.2, a value similar to that described in this series. Although Maino et al 22 suggested that TonoSafe® should be avoided for IOP measurements higher than 25 mm Hg due to the bias found in their study, there were only nine eyes with pressures higher than this value in this study, which precludes statistical analysis to corroborate or contradict the cited author's conclusion.…”

Section: Discussioncontrasting

confidence: 58%

“…Studies demonstrate a good correlation between the measurements obtained with the disposable cone and the traditional one. 19 – 22 , 25 , 27 In the national literature, to the present day, there are no series comparing IOP measurements with disposable and conventional tips.…”

Section: Introductionmentioning

confidence: 99%

Goldmann Applanation Tonometry: Comparison of Intraocular Pressure Values Obtained with Disposable Tip and Conventional Applanation Prism in the Population without Clinical Signs of Glaucoma

Soares,

Santos,

Filho

et al. 2023

Journal of Current Glaucoma Practice

View full text Add to dashboard Cite

A bstract Aim Comparing intraocular pressure (IOP) measurements using Goldmann applanation prism and TonoSafe® in the population without signs of glaucoma. Material and methods Patients with no ocular pathologies, except ametropia (until ± 4 D) or IOP of <30 mm Hg without signs of glaucoma by optic disc structural analysis by fundus biomicroscopy. The IOP was measured sequentially using the traditional cone and the TonoSafe®, according to a randomization list to determine which device would be used first. The measurements from the right and left eyes were compared separately. Since there was no statistical difference, both eyes were considered in this study. Results A total of 385 eyes of 194 patients with a mean age of 66.4 ± 11.2 years old were included. The mean IOP with conventional prism was 14.2 ± 3.6 and 14.3 ± 3.6 mm Hg with TonoSafe ® . Differences were not statistically significant by the Wilcoxon test ( p = 0.3). The median was 14.0 mm Hg for both groups. The mean difference between measurements was 0.04 mm Hg, with the median equal to zero. There was no statistical difference in IOP readings according to which device was the first measurement. Conclusion No statistical difference was found in IOP was measured with conventional prism or TonoSafe® in the population without signs of glaucoma. Clinical significance The data provided by our study support the efficacy and safety of the disposable tonometer compared to the Goldman tonometer in measuring IOP in patients without glaucoma. How to cite this article Soares PHA, Santos RDO, Filho CRADM, et al. Goldmann Applanation Tonometry: Comparison of Intraocular Pressure Values Obtained with Disposable Tip and Conventional Applanation Prism in the Population without Clinical Signs of Glaucoma. J Curr Glaucoma Pract 2023;17(2):75-78.

show abstract

“…30,31 However, a recent study has found the Tonosafe TM prism to be less accurate in a glaucoma population, particularly where the intraocular pressure exceeds 25 mm Hg. 32 Furthermore, the use of a disposable tonometer does not completely eliminate the risk of cross-contamination between eyes due to manual handling of the tonometer prism 33 and has cost implications. 30 Currently, in the UK, there appears to be great disparity between current tonometer disinfection practice and published international recommendations, with some institutions using non-evidence-based practices, which may render patients susceptible to transmissible ocular infections and possibly systemic disease.…”

Section: Discussionmentioning

confidence: 99%

Tonometer disinfection practice in the United Kingdom: A national survey

Hillier

Kumar

2007

Eye

View full text Add to dashboard Cite

Purpose: To assess current tonometer disinfection practice in the UK, and compare with published recommendations. Methods: Every ophthalmology unit with training recognition in the UK was contacted (n ¼ 155). A senior nurse at each institution completed a telephone questionnaire regarding local tonometer disinfection practice. Results: The response rate was 100%. Thirty-five units (23%) reported exclusive use of disposable tonometer heads and were excluded from further analysis. One hundred and twenty units (77%) used either reusable or a combination of reusable and disposable tonometer heads. Where reusable heads were used, 80 units (67%) immersed them in a chlorine-based solution such as sodium hypochlorite or sodium dichloroisocyanurate.

show abstract

Are Disposable Prisms an Adequate Alternative to Standard Goldmann Tonometry Prisms in Glaucoma Patients?

Cited by 11 publications

References 14 publications

Applanation tonometry: interobserver and prism agreement using the reusable Goldmann applanation prism and the Tonosafe disposable prism

Applanation tonometry: interobserver and prism agreement using the reusable Goldmann applanation prism and the Tonosafe disposable prism

Goldmann Applanation Tonometry: Comparison of Intraocular Pressure Values Obtained with Disposable Tip and Conventional Applanation Prism in the Population without Clinical Signs of Glaucoma

Tonometer disinfection practice in the United Kingdom: A national survey

Contact Info

Product

Resources

About