Visual quality outcomes
Visual quality outcomes evaluated by means of the QoV questionnaire before and after the training are reported in Tables Quality of Vision questionnaire results obtained before the training in the placebo and study groups. Results were represented in percentage (and number of subjects) for frequency, severity and bothersomeness of the different disturbances evaluatedQuality of Vision questionnaire results obtained after the training in the placebo and study groups. Results were represented in percentage (and number of subjects) for frequency, severity and bothersomeness of the different disturbances evaluatedIn the placebo group, statistically significant changes were found with training in the frequency of blur (Once the raw questionnaire data were Rasch-scaled onto an interval level scale, the mean values are displayed in Fig. Rasch-scale scores of frequency, severity and bothersomeness of quality of vision disturbances before and after training