Data
80,677 items of data are available, covering 72,121 participants, encoded using Data-Coding
100515.
Defined-instances run from 0 to 3, labelled using Instancing
2.
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
44,634 participants, 44,634 items
Instance 1 : First repeat assessment visit (2012-13)
8,194 participants, 8,194 items
Instance 2 : Imaging visit (2014+)
25,693 participants, 25,693 items
Instance 3 : First repeat imaging visit (2019+)
2,156 participants, 2,156 items
Notes
ACE touchscreen question "Which eye(s) are affected by presbyopia?"
Field 5610 was collected from participants who indicated they wear glasses or contact lenses to correct their presbyopia, as defined by their answers to Field 6147