Table 6: Adjusted Goldmann applanation tonometry intraocular pressure measurements in comparison with Pascal dynamic contour tonometry intraocular pressure measurements in patients with central corneal thickness between 536 and 567 µm (n = 95) IOP correction formula Mean difference 95% limits % patients in IOP, mm Hg of with IOP (SD) agreement, difference ≥ [IOP – PDCT mm Hg 20% P-value IOP] GAT IOP (unadjusted) -1.7 (2.5) <0.001 -6.6 – 3.2 22.1 IOPg -2.4 (2.7) <0.001 -7.7 – 3.0 38.9 IOPcc -1.2 (2.7) <0.001 -6.6 – 4.1 18.9 -2.0 (2.5) <0.001 -6.9 – 3.0 23.2 IOPDOUG Zaman) (Doughty & 9 IOPWHIT (Whitacre et al) 10 -1.5 (2.5) <0.001 -6.4 – 3.4 17.9 11 -1.8 (2.6) <0.001 -6.9 – 3.2 25.3 12, 13 -2.1 (2.6) <0.001 -7.1 – 2.9 25.3 IOPSHIM (Shimmyo et al) IOPPACH (Pachymeter) IOP = intraocular pressure; SD = standard deviation; PDCT IOP = Pascal dynamic contour tonometry intraocular pressure; GAT IOP = Goldmann applanation tonometry intraocular pressure; IOPg = Goldmann-correlated intraocular pressure as measured from the Ocular Response Analyzer; IOPcc = Corneal-compensated intraocular pressure as measured from the Ocular Response Analyzer; IOPDOUG = Intraocular pressure after adjustment with the correction formula described by Doughty & Zaman; IOPWHIT = Intraocular pressure after adjustment with the correction formula described by Whitacre et al; IOPSHIM = Intraocular pressure after adjustment with the correction formula described by Shimmyo et al; IOPPACH = Intraocular pressure after adjustment based on the correction table provided with the Pachmate DGH55 Portable Pachymeter.
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