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Br J Ophthalmol 89:851-854 doi:10.1136/bjo.2004.056622
  • Clinical science
    • Extended reports

The influence of central corneal thickness and age on intraocular pressure measured by pneumotonometry, non-contact tonometry, the Tono-Pen XL, and Goldmann applanation tonometry

Table 2

 Increase in IOP (mm Hg) for every 10 μm increase in CCT. Summary of previous findings regarding effect of CCT on IOP measurements

Author Study type Country GAT Tono-Pen OBF NCT
M, male; R, right eye; F, female; L, left eye.
This study Clinic based United Kingdom 0.28 0.31 0.38 0.46
Ko et al, 20046 Clinic based Taiwan 0.37 0.47 0.63
Siganos et al, 200436 Clinic based Greece 0.26 0.39
Bhan et al, 20025 Clinic based United Kingdom 0.23 0.10 0.28
Gunvant et al, 200421 Clinic based United Kingdom 0.27 0.48
Morgan et al, 200312 Clinic based United Kingdom 0.30
Shimmyo et al, 200322 Clinic based United States 0.16
Eysteinsson et al, 200223 Population based Iceland 0.22 (M)
0.28 (F)
Dohadwala et al, 19984 Population based Indian subcontinent 0.29 (M)
0.12 (F)
Foster et al, 200324 Population based Singapore 0.15 (R)
0.18 (L)
Foster et al, 199825 Population based Mongolia 0.18 (R)
0.24 (L)
Wolfs et al, 199738 Population based Netherlands 0.19
Nemesure et al, 200339 Population based Barbados none
Feltgen et al, 200116 Manometry Germany none
Foster et al, 200017 Manometry Singapore none
Ehlers, 19751 Manometry Denmark 0.71

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