Correlation of Intraocular Pressure Measured by Applanation Tonometry, Noncontact Tonometry and TonoPen with Central Corneal Thickness
Authors:
M. Česká Burdová; K. Ferrová; A. Filouš; K. Oskorypová; P. Ležatková; P. Sedláčková
Authors‘ workplace:
Oční klinika dětí a dospělých UK 2. LF a FN Motol, Praha
přednostka prof. MUDr. D. Dotřelová, CSc.
Published in:
Čes. a slov. Oftal., 67, 2011, No. 5-6, p. 154-157
Category:
Original Article
Overview
The purpose of the study was to determine the dependence of intraocular pressure (IOP) measured by Goldmann applanation tonometer (AT), non-contact tonometer (BT) and Tono-Pen (TP) on central corneal thickness (CCT) as well as the respective comparison in relation to the central corneal thickness.
Methods:
CCT and IOP were assessed in 106 eyes of 106 subjects aged 7–77 years (mean 34.3 ± 17.1 years). IOP was measured with BT, TP and AT. Central corneal thickness was assessed using ultrasound pachymetry. The obtained data were statistically analyzed.
Results:
The mean CCT in 106 eyes was 572 ± 46 μm (range 455–701 μm). A positive correlation between IOP and CCT was found in all types of tonometry. The change in measured IOP for a 100μm of CCT was 2.0, 2.5 and 5.6 mmHg for TP, AT and BT, respectively.
Conclusion:
IOP measurement by all three methods is affected by CCT. The BT is influenced by CCT significantly more than are AT and TP.
Key words:
central corneal thickness, intraocular pressure, Goldmann applanation tonometry, non-contact tonometry, Tono-Pen
Sources
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OphthalmologyArticle was published in
Czech and Slovak Ophthalmology
2011 Issue 5-6
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