Data
82,815 items of data are available, covering 73,790 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+)
27,575 participants, 27,575 items
Instance 3 : First repeat imaging visit (2019+)
2,412 participants, 2,412 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