Shortened Measurement Time of Functional Visual Acuity for Screening Visual Function

Figure 4

The Bland–Altman plot shows the agreement between the visual maintenance ratio (VMR) measured using the standard- and short-version methods. The solid line shows the mean difference, and the VMR dashed lines show the 95% limits of agreement. Several plots overlap. 30 VMR = VMR measured using the short-version method; 60 VMR = VMR measured using the standard-version method.