Abstract

Background: Refractive laser surgery induces substantial changes in corneal structure, causing inaccurate intraocular pressure (IOP) readings. Pascal dynamic contour tonometry (PDCT) and Icare rebound tonometer (RBT) are two novel devices that do not depend on applanation to measure IOP. Purpose of this prospective study was to compare PDCT and rebound tonometry versus Goldmann tonometry (GAT) in a group of patients who underwent photorefractive keratectomy (PRK). Methods: Central corneal thickness and IOP were measured in 54 eyes before and after PRK. All IOP measurements were taken by the same examiner, using PDCT, RBT and GAT in a randomised, masked fashion. Results: After excimer laser surgery, PDCT measurements were higher than GAT (p<0.0001) and RBT (p=0.0012). Multiple linear regression analysis indicated that size of contact area was significant (b=-0.504; p<0.0001) while corneal thickness was not (b=0.003; p=0.169). Bland-Altman test showed that there was good agreement between RBT and PDCT (p=0.454), whereas GAT gave lower IOP values than both RBT (p=0.0103) and PDCT (p=0.0031). Conclusion: PDCT and RBT are less dependent on iatrogenic corneal changes than GAT and this might be related to their small contact area. In order to minimise IOP underestimation after excimer laser surgery, the clinician should consider adopting non-applanation tonometers like RBT and PDCT as an alternative to GAT.

Autore Pugliese

• Serio Gabriella , Vetrugno Michele , Trerotoli Paolo

Tutti gli autori

• SERIO G.;VETRUGNO M.;TREROTOLI P.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2010

ISSN

2155-9570

ISBN

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Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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