Figure 2.

Person-Item or Wright’s maps illustrating the distributions of patient responses in the upper panel from those with two cataracts, in the second panel from those with one cataract (a cataract in one eye and either pseudophakia or a clear crystalline lenses in the other), and in the third panel those with no cataracts (either bilateral pseudophakia or pseudophakia in one eye and a clear crystalline lenses in the other). The lower panel in (a) shows the positions of the Item Locations (Loc) and Category Thresholds (T#) for Cat-PROM5 and (b) shows these similarly for Catquest-9SF. All panels refer to the same horizontal scale from −9 to +9 logits.