Table 1.

The Correlation of Changes in RMS Fit Error in the Three Subject Groups

Group	RMS Fit Error	RI Contrast	Fourier Descriptors PJ
No tear break-up	0.901	0.8078	0.8781
	0.4357	0.0319	0.0669
	0.0503	0.3442	0.197
	0.5436	0.756	0.6582
	0.5869	0.5977	0.3774
Peripheral tear break-up	0.0782	0.4617	0.012
Central tear break-up	0.9414	0.975	0.8516
	0.9261	0.6261	0.8986
	0.9187	0.8373	0.4917
	0.9209	0.9603	0.6652

RI contrast and Fourier descriptor with change in contrast threshold from all 10 subjects.