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					                                                              PASCAL Publication List
                                                             Papers published in 2008 (Jan-Jun)
Nbr     Date      Authors
Publ.Type             Reference                                                                    Title                                                     generated on 30.6.2008                         page 1

08-02 Jun 08 Boehm AG, Weber A, Pillunat LE, Koch R, Spoerl E                                      Dynamic Contour Tonometry in Comparison to Intracameral IOP Measurements.
 Original Paper Invest Ophthalmol Vis Sci. (IOVS) 2008 Jun;49(6):2472-7. Epub 2008
                Mar 3
PMID 18316699
      CONCLUSIONS: Measurements with the DCT showed good concordance with intracameral IOP. At IOP of 15 mm Hg, the mean difference between IOP measured by DCT and intracameral IOP was -0.02 +/-
      1.32 mm Hg; at 20 mm Hg it was -0.2 +/- 1.44 mm Hg and at 35 mm Hg, -0.84 +/- 1.90 mm Hg.
      75 eyes of 75 patients undergoing phacoemulsification were examined. Before phacoemulsification, the anterior chamber was cannulated at the temporal corneal limbus. In a closed system the IOP was directly
      set to 15, 20, or 35 mm Hg with a manometric water column. IOP measurements taken by DCT were compared to intracameral measurements with a precision reference pressure sensor. This paper provides
      the conclusive proof: PASCAL measures true IOP!
      http://www.ncbi.nlm.nih.gov/pubmed/18316699

 08-16 Jun 08 Hamilton KE, Pye DC, Kao L, Pham N, Tran AQ                                          The effect of corneal edema on dynamic contour and goldmann tonometry.
 Original Paper Optom Vis Sci. 2008 Jun;85(6):451-6.
PMID 18521023
      Contact lens-induced corneal edema caused a small underestimation error in IOP measurements by the Pascal DCT, and an overestimation error in Goldmann tonometry measurements. The OPA measurement
      provided by the Pascal DCT is insensitive to corneal edema-induced changes in corneal properties.

      http://www.ncbi.nlm.nih.gov/pubmed/18521023

 08-04 Mai 08 Chihara E                                                                            Assessment of true intraocular pressure: the gap between theory and practical data.
 Review Paper Surv Ophthalmol. 2008 May-Jun;53(3):203-18
PMID 18501267
      In this article, previously reported theoretical equations about the effects of corneal topography, modulus of elasticity, and tear film on Goldmann applanation tonometric IOP readings were reviewed, and their
      discrepancies with clinical or experimental data were analyzed. Thereafter, new tonometers such as the dynamic contour tonometer, the rebound tonometer, and the ocular response analyzer were compared with
      the Goldmann applanation tonometer and other popular tonometers.
      Recent epidemiologic studies show that a difference of only 1 mm Hg in the mean IOP may be critical enough to determine the visual field prognosis in patients with glaucoma. However, the Goldmann
      applanation tonometer, which is current gold standard, is not precise enough to measure the true IOP within an error of 1 mm Hg.
      http://www.ncbi.nlm.nih.gov/pubmed/18501267

 08-11 Mai 08 Vajaranant TS, Price MO, Price FW, Wilensky JT, Edward DP.                           Intraocular pressure measurements following Descemet stripping endothelial keratoplasty.
 Original Paper Am J Ophthalmol. 2008 May;145(5):780-6. Epub 2008 Mar 10
PMID 18329627
      Pneumatonometry and DCT IOP measurements were significant higher than GAT (P < .01) The mean IOP +/- standard deviation (SD) was 15.9 +/- 4.9 mm Hg for GAT, 20.3 +/- 4.5 mm Hg for pneumatonometry,
      and 19.8 +/- 4.4 mm Hg for DCT.
      Falsely elevated GAT, as expected in thick corneas, was not demonstrated after DSEK. ... On the contrary: GAT reads too low! (soft cornea!)
      http://www.ncbi.nlm.nih.gov/pubmed/18329627




      printed from PASCAL Publications Database Jun 2008
                                                              PASCAL Publication List
                                                              Papers published in 2008 (Jan-Jun)
Nbr     Date      Authors
Publ.Type             Reference                                                                     Title                                                     generated on 30.6.2008                          page 2

 08-07 Apr 08 Carbonaro F, Andrew T, Mackey DA, Spector TD, Hammond CJ.                             The Heritability of Corneal Hysteresis and Ocular Pulse Amplitude. A Twin Study.
 Original Paper Ophthalmology. 2008 Apr 23. [Epub ahead of print]
PMID 18439682
      PURPOSE: To examine the roles of genetic and environmental factors in corneal hysteresis and ocular pulse amplitude by performing a classic twin study. CONCLUSIONS: This study demonstrated that additive
      genetic influences explained most of the individual differences in corneal hysteresis and ocular pulse amplitude among these twins.

      http://www.ncbi.nlm.nih.gov/pubmed/18439682

 08-08 Apr 08 Hager A, Wiegand W.                                                                   Methods of measuring intraocular pressure independently of central corneal thickness
 Original Paper Ophthalmologe. 2008 Apr 27. (Epub ahead of print)
PMID 18438633
      There was a positive correlation between GAT and CCT that did not exist for IOPcc and DCT values. However, IOPcc and DCT differed significantly in Bland-Altman analysis (p<0.01). Furthermore, these two
      IOP values differed significantly with respect to CH and the level of IOP. CONCLUSION: Because IOPcc is not a primarily measured variable but also takes CH into account, a direct comparison of DCT and
      IOPcc values is not acceptable, and a simple correction factor may not be valid.
      250 eyes (Glaucoma & healthy).
      http://www.ncbi.nlm.nih.gov/pubmed/18438633

 08-10 Apr 08 Meyenberg A, Iliev ME, Eschmann R, Frueh BE.                                          Dynamic contour tonometry in keratoconus and postkeratoplasty eyes
 Original Paper Cornea. 2008 Apr;27(3):305-10.
PMID 18362658
      PURPOSE: To compare the performance of dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in measuring intraocular pressure in eyes with irregular corneas. CONCLUSIONS:
      DCT measured significantly higher intraocular pressures than GAT in keratoconus and postkeratoplasty eyes. DCT and GAT measures varied considerably, and DCT was not less dependent on biomechanical
      properties of irregular corneas than GAT.

      http://www.ncbi.nlm.nih.gov/pubmed/18362658

08-06 Mär 08 Read SA, Collins M, Iskander R.                                                        Diurnal variation of axial length, intraocular pressure and anterior eye biometrics.
 Original Paper Investigative Ophthalmology and Visual Science. IOVS 2008;49:2911
                -2918
PMID 18362106
      Diurnal variation in axial length and anterior eye biometrics, while simultaneously measuring IOP and OPA with dynamic contour tonometry in human subjects. axial length, IOP, and OPA are highest in the
      morning, lowest in the evening. IOP amplitude 3.1 mmHg; OPA amplitude 1.3 mmHg.
      Intraocular pressure and ocular pulse amplitude were also found to undergo significant diurnal change. Conclusion: Axial length undergoes significant variation over a 24 hour period. Associations exist between
      the change in axial length and the change in IOP as measured by dynamic contour tonometry. 15 healthy subjects Contact Lens and Visual Optics Laboratory, School of Optometry, Queensland University of
      Technology (QUT), Brisbane, Queensland, Australia.
      http://www.ncbi.nlm.nih.gov/pubmed/18362106




      printed from PASCAL Publications Database Jun 2008
                                                              PASCAL Publication List
                                                             Papers published in 2008 (Jan-Jun)
Nbr     Date      Authors
Publ.Type             Reference                                                                    Title                                                     generated on 30.6.2008                       page 3

 08-09 Mär 08 Milla E, Duch S, Buchacra O, Masuet C.                                               Poor agreement between Goldmann and Pascal tonometry in eyes with extreme pachymetry.
 Original Paper Eye. 2008 Mar 28. [Epub ahead of print]
PMID 18369376
      Conclusion: Statistically significant agreement between both devices was reached only at intermediate pachymetry readings in contrast with other studies that show excellent global agreement between GAT and
      PDCT.
      When CCT values ranged between 540 and 545 mum, the agreement between both tonometers was optimal (ICC 0.54 and Lin 0.61). Outside these pachymetry values, agreement between both tonometers
      diminished dramatically ... because GAT is CCT-dependent!
      http://www.ncbi.nlm.nih.gov/pubmed/18369376

 08-05 Feb 08 A Ebneter, B Wagels and MS Zinkernagel                                               Non-invasive biometric assessment of ocular rigidity in glaucoma patients and controls
 Original Paper Eye (2008), 1–6
PMID 18309334
      Purpose: To determine in vivo whether a pharmacologically induced change in intraocular pressure (IOP) leads to measurable changes in axial eye length and whether there is a difference between glaucoma
      patients and control subjects. Conclusion: ocular rigidity is increased in patients with established glaucoma
      IOP drops after intake of acetazolamide.
      http://www.ncbi.nlm.nih.gov/pubmed/18309334

 08-03 Feb 08 Ceruti P, Morbio R, Marraffa M, Marchini G                                           Comparison of dynamic contour tonometry and goldmann applanation tonometry in deep
 Original Paper Am J Ophthalmol. 2008 Feb;145(2):215-221.                                          lamellar and penetrating keratoplasties.

PMID 18222191
      PURPOSE: To compare the measurements of intraocular pressure (IOP) with dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in eyes with corneal graft and to evaluate the
      influence of corneal thickness (CCT), corneal curvature (CC), and astigmatism on these methods
      "... DCT provides IOP measurements on deep lamellar and penetrating keratoplasties which can be used in the clinical practice."
      http://www.ncbi.nlm.nih.gov/pubmed/18222191

 08-12 Feb 08 Erdurmus M, Totan Y, Hepsen IF, Yagci R                                              Comparison of dynamic contour tonometry and noncontact tonometry in ocular hypertension
 Original Paper Eye. 2008 Feb 8. [Epub ahead of print]                                             and glaucoma.

PMID 18259205
      Purpose: To assess the agreement in the measurement of intraocular pressure obtained by dynamic contour tonometer (DCT) and noncontact tonometer (NCT) in patients with glaucoma and ocular hypertension,
      to investigate the effect of corneal thickness on pressure readings by both instruments, and to assess the reproducibility of dynamic contour tonometer.MethodsNCT and DCT measurements were made on 104
      eyes of 104 patients with primary open-angle glaucoma (n=75) or ocular hypertension (n=29), and agreement was assessed by means of Bland-Altman plots. e. DCT measurements, unlike NCT measurements,
      did not depend on corneal thickness.
      Interobserver and intraobserver variations for dynamic contour tonometer were assessed in 41 eyes of 41 patients. The coefficient of repeatability for DCT was 0.92 (95% CI 0.85-0.96, P=0.001).
      http://www.ncbi.nlm.nih.gov/pubmed/18259205




      printed from PASCAL Publications Database Jun 2008
                                                              PASCAL Publication List
                                                              Papers published in 2008 (Jan-Jun)
Nbr     Date      Authors
Publ.Type             Reference                                                                     Title                                                     generated on 30.6.2008                          page 4

 08-14 Jan 08 Herdener S, Hafizovic D, Pache M, Lautebach S, Funk J.                                Is the PASCAL-Tonometer suitable for measuring intraocular pressure in clinical routine? Long-
 Original Paper Eur J Ophthalmol. 2008 Jan-Feb;18(1):39-43.                                         and short-term reproducibility of dynamic contour tonometry.

PMID 18203083
      he authors evaluated the reproducibility/repeatability (RP) of DCT compared to GAT, a prerequisite for its introduction into clinical routine. CONCLUSIONS: Short- and long-term reproducibility of DCT is
      comparable to that of GAT. GAT is more affected by CCT than DCT, measuring higher IOPs in eyes with higher central corneal thickness.
      50 subjects. Short-term Repeatability was 1.1 mmHg for GAT and 1.2 mmHg for DCT
      http://www.ncbi.nlm.nih.gov/pubmed/18203083

08-15 Jan 08 Vulsteke C, Stalmans I, Fieuws S, Zeyen T.                             Correlation between ocular pulse amplitude measured by dynamic contour tonometer and
 Original Paper Graefes Arch Clin Exp Ophthalmol. 2008 Apr;246(4):559-65. Epub 2008 visual field defects.
                Jan 12.
PMID 18193267
       CONCLUSION: A small ocular pulse amplitude, as measured with a dynamic contour tonometer, is correlated with moderate to severe glaucomatous visual field loss and might be a risk factor for the
      development of glaucomatous visual field defects.
      77 eyes (42 patients) with glaucoma, ocular hypertension or glaucoma suspicion were examined.
      http://www.ncbi.nlm.nih.gov/pubmed/18193267

 08-01 Jan 08 ElMallah MK, Asrani SG.                                                               New ways to measure intraocular pressure
 Review Paper Curr Opin Ophthalmol. 2008 Mar;19(2):122-6.
PMID 18301285
      Dynamic contour tonometry provides intraocular pressure readings that are less dependent on corneal properties than Goldmann applanation tonometry. Rebound tonometry appears to correlate well with
      Goldmann tonometry and can be used without topical anesthesia.

      http://www.ncbi.nlm.nih.gov/pubmed/18301285




      printed from PASCAL Publications Database Jun 2008