Fig. 2From: Psychometric evaluation of the near activity visual questionnaire presbyopia (NAVQ-P) and additional patient-reported outcome itemsItem-person map representing participants and NAVQ-P items on the same latent trait in the cross-sectional analysis population at Month 2 i1 to i15 (i = Item) indicate location of NAVQ-P item in respect to respondent latent trait/item difficulty scale.Back to article page