Data
124,563 items of data are available, covering 54,783 participants, encoded using Data-Coding 
1206.
Defined-instances run from 0 to 1, labelled using Instancing 
2.
Array indices run from 0 to 5.
 
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
47,485 participants, 105,840 items
 
Instance 1 : First repeat assessment visit (2012-13)
8,233 participants, 18,723 items
 
Notes
This data field is a string-encoded value meaning result is unreliable for the keratometry result taken at 6mm for the right eye
1 Related Data-Field
| Field ID | Description | Relationship | 
|---|
| 5138 | 6mm keratometry result unreliable (left) | Field 5138 is the opposite-side complement to  Current Field |