Measuring Visual Function Using the MultiQuity System: Comparison with an Established Device

Table 2

Agreement indices for test-retest of CDVA and CS by Thomson and MiQ devices.

Measure	CCC	Precision	Accuracy
CDVA Thomson	0.896 (0.847)	0.961 (0.921)	0.933 (0.891)
CDVA MiQ	0.885 (0.800)	0.922 (0.847)	0.959 (0.896)
CS Thomson	0.931 (0.877)	0.960 (0.921)	0.970 (0.928)
CS MiQ	0.903 (0.823)	0.919 (0.840)	0.983 (0.927)

CCC: concordance correlation coefficient; CDVA: corrected distance visual acuity; CS: contrast sensitivity; MiQ: MultiQuity.
For each coefficient, the 95% lower confidence limit is shown in brackets (based on subjects).