Data
391,406 items of data are available, covering 132,921 participants.
Defined-instances run from 0 to 1, labelled using Instancing 
2.
Array indices run from 0 to 15.
Average length is 5.0 characters, longest is 5.
 
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
116,954 participants, 332,990 items
Too few values for statistical summary.
Instance 1 : First repeat assessment visit (2012-13)
20,179 participants, 58,416 items
Too few values for statistical summary.
 
Notes
Visual acuity (left), displayed letters in round
2 Related Data-Fields
| Field ID | Description | Relationship | 
| 5080 | Displayed letters in round (right) | Current Field is the opposite-side complement to  Field 5080 | 
| 5082 | Visual acuity result in round (left) | Field 5082  indicates which letters the participant correctly identified from  Current Field |