Table 2.

Summary of average thickness readings (and 95% confidence intervals), in unstretched and stretched state, for samples of 10 disposable oculofilm covers derived from five separate batches

	Unstretched readings (mm)	Stretched readings (mm)
Batch study sample number	Travelling microscopy (CI)	Coordinate (CI)	Interferometry (CI)
1 (used in main study)	0.069 (0.020)	0.013 (0.0012)	0.012 (0.0029)
2	0.079 (0.020)	0.010 (0.0008)	–
3	0.080 (0.025)	0.008 (0.0008)	–
4	0.088 (0.024)	0.009 (0.0018)	–
5	0.069 (0.018)	0.010 (0.0024)	–