Fig. 7From: Development of the Near Vision Presbyopia Task-based Questionnaire for use in evaluating the impact of presbyopiaeCDF of change in NVPTQ Performance by change in UNVA. Note Change is computed as Day 28 Hour 1 minus Day 1 Hour 0. Positive scores indicate improvement. eCDF, empirical cumulative distribution; NVPTQ, Near Vision Presbyopia Task-based Questionnaire; UNVA, uncorrected near visual acuityBack to article page