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136,281 items of data are available, covering 132,116 participants, encoded using Data-Coding 100274
Defined-instances run from 0 to 1, labelled using Instancing 2
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
116,280 participants, 116,280 items
Instance 1 : First repeat assessment visit (2012-13)
20,001 participants, 20,001 items
Auto-refraction method (right)
1 Related Data-Fields
|5191||Auto-refraction method (left)||Field 5191 is the opposite-side complement to Current Field|