Data
16,843 items of data are available, covering 16,162 participants.
Defined-instances run from 2 to 3, labelled using Instancing 
2.
Units of measurement are degrees.
| 
| Maximum | 180 |  | Decile 9 | 172 |  | Decile 8 | 143 |  | Decile 7 | 116 |  | Decile 6 | 98 |  | Median | 90 |  | Decile 4 | 74 |  | Decile 3 | 40 |  | Decile 2 | 16 |  | Decile 1 | 7 |  | Minimum | 0 |  |   | 
There are 181 distinct values.Mean = 84.3753Std.dev = 57.1871 | 
2 Instances
Instance 2 : Imaging visit (2014+)
3,507 participants, 3,507 items
| 
| Maximum | 180 |  | Decile 9 | 171 |  | Decile 8 | 141 |  | Decile 7 | 116 |  | Decile 6 | 98 |  | Median | 90 |  | Decile 4 | 73.5 |  | Decile 3 | 39 |  | Decile 2 | 15 |  | Decile 1 | 7 |  | Minimum | 0 |  |   | 
There are 181 distinct values.Mean = 83.6798Std.dev = 57.0439 | 
Instance 3 : First repeat imaging visit (2019+)
13,336 participants, 13,336 items
| 
| Maximum | 180 |  | Decile 9 | 172 |  | Decile 8 | 143 |  | Decile 7 | 116 |  | Decile 6 | 98 |  | Median | 90 |  | Decile 4 | 74 |  | Decile 3 | 40 |  | Decile 2 | 16 |  | Decile 1 | 7 |  | Minimum | 0 |  |   | 
There are 181 distinct values.Mean = 84.5583Std.dev = 57.2233 | 
Notes
Trial lens cylinder axis (right)
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