Table 2. Person measures for IVI overall and three subscale scores for the normal control and cataract patients.

Person Measures	Control Group					Cataracts Group
	Absolutedifference	% ≤1 stepdifference	r	Cronbach α	Absolutedifference	% ≤1 stepdifference	r	Cronbach α
Reading and accessing information	0.11±0.34	99.3	0.91	0.98	0.29±0.63	94.2	0.73	0.79
Mobility and independence	0.06±0.24	100	0.91	0.97	0.28±0.66	92.0	0.86	0.85
Emotional well-being	0.04±0.20	100	0.94	0.97	0.27±0.66	93.3	0.72	0.84
Overall score	0.11±0.34	99.3	0.98	0.99	0.28±0.65	93.1	0.78	0.83

r; Pearson correlation. Data are expressed at the mean ± SD.