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Br J Ophthalmol 87:583-586 doi:10.1136/bjo.87.5.583
  • Original Article
    • Clinical science

Retention of corneal epithelial cells following Goldmann tonometry: implications for CJD risk

Table 1

Retained corneal epithelial cell count by strategy group. A non-parametric comparison of the means

Group Strategy No Mean No (range) of cells counted Mann-Whitney U (z value) p Value
With Bonferroni correction the results remain significant at the p= 0.05 level.
1 Patients not on eye drops 10 14 (4–57) 2.88 0.004
2 Patients on eye drops 10 156 (0–470) Reference group
3 Wiped once 10 9 (2–35) 2.92 0.004
4 Wipe/Milton 10 10 (4–35) 2.95 0.003
5 Dried 24 hours 10 116 (23–320) 0.76 0.5
6 Dried 24 hours/wiped/Milton 9 11 (1–42) 2.86 0.004
7 Washed/Milton 10 7 (2–26) 2.96 0.003

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