Table 1.

Cross-table illustrating the categorization of subjects according to visual impairment of both eyes in the population-based Gutenberg Health Study (2007–2012)

		Worse-seeing eye:
		No VI	Mild VI	Moderate/severe
Better-seeing eye:	No VI	“b0/w0”, n = 11,021	“b0/w1”, n = 430	“b0/w2”, n = 395
	Mild VI	/	“b1/w1”, n = 35	“b1/w2”, n = 34
	Moderate/severe VI	/	/	“b2/w2”, n = 26

BE Better-seeing eye, WE Worse-seeing eye, VI Vision impairment; no VI: < 0.32 logMAR, mild VI: 0.32–0.5 logMAR; moderate/severe VI: > 0.5 logMAR