Data
79,053 items of data are available, covering 70,741 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
44,635 participants, 44,635 items
Instance 1 : First repeat assessment visit (2012-13)
8,194 participants, 8,194 items
Instance 2 : Imaging visit (2014+)
24,102 participants, 24,102 items
Instance 3 : First repeat imaging visit (2019+)
2,122 participants, 2,122 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