Data
92,760 items of data are available, covering 80,787 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
44,615 participants, 44,615 items
Instance 1 : First repeat assessment visit (2012-13)
8,190 participants, 8,190 items
Instance 2 : Imaging visit (2014+)
34,982 participants, 34,982 items
Instance 3 : First repeat imaging visit (2019+)
4,973 participants, 4,973 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