WARNING: the interactive features of this website use CSS3, which your browser does not support. To use the full features of this website, please update your browser.
1,520 items of data are available, covering 1,520 participants, encoded using Data-Coding 54. Defined-instances run from 0 to 0, labelled using Instancing 2.
Against participant wishes276
Lack of time25
Unwilling to remove contact lenses346
Reason not known17
Other health reason48
Unable to understand instructions0
Other eye-related reason517
Counts of participants/items last updated 30 Oct 2020.
Reason refractometry measurement (left eye) was not performed (entered as free-text by a UK Biobank Staff member).
This field was created by post-hoc coding the free-text reasons entered during the assessment centre visit. The encoding used was constructed after the data had been examined to determine suitable representative groupings.