Fig. 1
From: Piloting Rasch model scoring of the National Eye Institute Visual Function Questionnaire in uveitis
Person-item map of the National Eye Institute Visual Function Questionnaire in the uveitis sample. Items marked with an A belong to the visual function subscale, and items marked with a B are part of the socioemotional subscale. Individual respondents are shown on the left and items are displayed on the right. Items are plotted according to their order of difficulty with the easiest at the bottom and the most difficult at the top of the Figure