Table 5

Proposed outcomes to form the basis for a core outcome set for studies of multifocal lenses in cataract surgery

 Domain Specific measurement Method of aggregation Distance visual acuity LogMAR chart, with and without usual spectacles Mean Near visual acuity LogMAR chart, with and without usual spectacles Mean Contrast sensitivity Pelli-Robson chart, with and without usual spectacles Mean Spectacle independence Questionnaire, overall, distance and near separately Proportion of people spectacle free, that is, do not need to use spectacles for any task Quality of life Questionnaire: ideally VF-7 or VF-14 Mean Visual symptoms, for example, glare haloes Questionnaire: glare, haloes and other visual symptoms Proportion of people with visual symptoms, each symptom reported separately