Anthony Wells FRANZCO

Wellington Hospital, Веллингтон, England, United Kingdom

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Publications (2)3.93 Total impact

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    ABSTRACT: Background:  To examine the relationships between optic disc area and parameters measured at the cornea; central corneal thickness (CCT), corneal hysteresis (CH) and ocular pulse amplitude (OPA) in glaucoma subjects and controls.Methods:  In this prospective experimental study, patients underwent measurement of CCT, OPA, CH and optic disc imaging with the Heidelberg Retina Tomograph II (HRT-II). Pearson's correlation coefficient was calculated to assess the associations between optic disc area and CCT, OPA and CH.Results:  A total of 100 patients, 38 with glaucoma and 62 controls were examined. In a univariate analysis of this group, CCT and CH were significantly lower in glaucoma patients (P = 0.01). CCT was inversely correlated with optic disc surface area (Pearson's correlation coefficient r = −0.200; P = 0.05). This inverse correlation did not achieve statistical significance when glaucoma patients and controls were analysed separately. There was no statistically significant association between optic disc area and OPA or CH.Conclusions:  There was an inverse relationship between CCT and optic disc area in this study group. No association was found between optic disc area and OPA or CH.
    Clinical and Experimental Ophthalmology 11/2010; 38(9):839 - 844. · 1.96 Impact Factor
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    ABSTRACT: Purpose:  To assess agreement between the iCare rebound tonometer and Goldmann tonometry and to assess the influence of central corneal thickness and the value of scleral rebound tonometer readings.Methods:  Prospective single-centre cross-sectional study comparing iCare rebound tonometer (RT) intraocular pressure (IOP) readings taken from corneal and scleral locations to Goldmann applanation tonometer (GAT) readings in 100 subjects attending ophthalmology clinics.Results:  There was a significant difference between RT and GAT, with RT tending to overestimate IOP. The mean difference between RT and GAT measurements was 3.36 mmHg. The mean difference between the log of RT and the log of GAT measurements was 0.2356, a ratio of 1.27 (P < 0.0001). A formula derived from a linear regression analysis suggested that a 10% increase in CCT increased the RT IOP reading by 9.9%. Scleral RT readings showed no relationship to GAT readings.Conclusions:  The rebound tonometer cannot replace the Goldmann tonometer in the office setting given the wide limits of agreement between the two devices. Corneal rebound tonometer readings are influenced by CCT whereas scleral rebound tonometer readings are of no value.
    Clinical and Experimental Ophthalmology 07/2009; 37(7):687 - 691. · 1.96 Impact Factor

Publication Stats

8 Citations
3.93 Total Impact Points

Institutions

  • 2009
    • Wellington Hospital
      Веллингтон, England, United Kingdom
    • Pacific Eye Specialists
      San Francisco, California, United States