Data
385,041 items of data are available, covering 132,972 participants.
Defined-instances run from 0 to 1, labelled using Instancing 
2.
Array indices run from 0 to 15.
| 
| Maximum | 5 |  | Decile 9 | 5 |  | Decile 8 | 5 |  | Decile 7 | 5 |  | Decile 6 | 5 |  | Median | 5 |  | Decile 4 | 5 |  | Decile 3 | 5 |  | Decile 2 | 5 |  | Decile 1 | 5 |  | Minimum | 2 |  |   | 
There are 4 distinct values.Mean = 4.98472Std.dev = 0.1894121861 items below graph minimum of 4 | 
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
117,010 participants, 328,225 items
| 
| Maximum | 5 |  | Decile 9 | 5 |  | Decile 8 | 5 |  | Decile 7 | 5 |  | Decile 6 | 5 |  | Median | 5 |  | Decile 4 | 5 |  | Decile 3 | 5 |  | Decile 2 | 5 |  | Decile 1 | 5 |  | Minimum | 2 |  |   | 
There are 4 distinct values.Mean = 4.9847Std.dev = 0.189771590 items below graph minimum of 4 | 
Instance 1 : First repeat assessment visit (2012-13)
20,178 participants, 56,816 items
| 
| Maximum | 5 |  | Decile 9 | 5 |  | Decile 8 | 5 |  | Decile 7 | 5 |  | Decile 6 | 5 |  | Median | 5 |  | Decile 4 | 5 |  | Decile 3 | 5 |  | Decile 2 | 5 |  | Decile 1 | 5 |  | Minimum | 2 |  |   | 
There are 4 distinct values.Mean = 4.98485Std.dev = 0.187336271 items below graph minimum of 4 | 
Notes
Visual acuity (right), number of letters shown in round
2 Related Data-Fields
| Field ID | Description | Relationship | 
|---|
| 5076 | Number of letters correct in round ( ... | Current Field is the maximum value possible for Field 5076 | 
| 5074 | Number of letters shown in round (left) | Field 5074 is the opposite-side complement to  Current Field |