Data
89,123 items of data are available, covering 78,457 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
44,617 participants, 44,617 items
Instance 1 : First repeat assessment visit (2012-13)
8,190 participants, 8,190 items
Instance 2 : Imaging visit (2014+)
32,801 participants, 32,801 items
Instance 3 : First repeat imaging visit (2019+)
3,515 participants, 3,515 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