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