March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
Comparison Of Intraocular Pressure Measurement Using Goldmann, Iopen And Icare Tonometers In Patients With Penetrating Keratoplasty
Author Affiliations & Notes
  • Patricia Toro
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Carmen Dora Mendez-Hernandez
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Ana Fernandez-Vidal
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Raquel Martinez-Chico
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Silvia Perez-Trigo
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Federico Saenz-Frances
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • David Diaz-Valle
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Jose Maria Martinez-de-la-Casa
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Enrique Santos
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Julian Garcia-Feijoo
    Glaucoma, Hospital Clinico San Carlos, Madrid, Madrid, Spain
  • Footnotes
    Commercial Relationships  Patricia Toro, None; Carmen Dora Mendez-Hernandez, None; Ana Fernandez-Vidal, None; Raquel Martinez-Chico, None; Silvia Perez-Trigo, None; Federico Saenz-Frances, None; David Diaz-Valle, None; Jose Maria Martinez-de-la-Casa, None; Enrique Santos, None; Julian Garcia-Feijoo, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 5087. doi:https://doi.org/
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      Patricia Toro, Carmen Dora Mendez-Hernandez, Ana Fernandez-Vidal, Raquel Martinez-Chico, Silvia Perez-Trigo, Federico Saenz-Frances, David Diaz-Valle, Jose Maria Martinez-de-la-Casa, Enrique Santos, Julian Garcia-Feijoo; Comparison Of Intraocular Pressure Measurement Using Goldmann, Iopen And Icare Tonometers In Patients With Penetrating Keratoplasty. Invest. Ophthalmol. Vis. Sci. 2012;53(14):5087. doi: https://doi.org/.

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

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Abstract

Purpose: : To compare Rebound, iCare and Iopen intraocular pressure (IOP) measurements with Goldmann applanation tonometry (GAT) in post-keratoplasty corneas, and to assess the influence of central corneal thickness (CCT), corneal curvature (CC), astigmatism, and time after PKP on IOP measurement.

Methods: : This cross-sectional study included one eye of 53 post-penetrating keratoplasty (PK) patients. All subjects underwent GAT, iCare and Iopen IOP measurements in random order, and CCT, CC and astigmatism evaluation. The Bland-Altman method and multivariate regression analysis were used to assess inter-tonometer agreement and the influence of CCT, CC and astigmatism on IOP.

Results: : iCare underestimated IOP compared with GAT (GAT minus iCare 1.93±7.03mmHg, (95% C.I. -0.86-3.96)). Iopen significantly underestimated IOP compared with GAT (GAT minus Iopen 3.59 ±9.08 mmHg (95% C.I. 0.98 - 6.19)). There was no significant relation between IOP and CCT, CC, astigmatism, or time after PKP. In 49 of 52 of the patients IOP measurements with GAT were reliable. There were no difficulties in obtaining measurements with either iCare or Iopen tonometries.

Conclusions: : Agreement between GAT and iCare was clinically optimal. No agreement was found between GAT and Iopen. GAT, iCare and Iopen measurements were not affected by CCT, CC, astigmatism, or time after PKP. iCare may be closer to providing a real IOP post-PK, and may be an alternative when GAT is not possible. However, Iopen measurements have to be taken cautiously bearing in mind the difference obtained with both methods.

Keywords: intraocular pressure • transplantation • clinical research methodology 
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