Data
16,803 items of data are available, covering 16,121 participants.
Defined-instances run from 2 to 3, labelled using Instancing 
2.
Units of measurement are dioptre.
| Maximum | 13 |  
| Decile 9 | 3.25 |  
| Decile 8 | 2.25 |  
| Decile 7 | 1.75 |  
| Decile 6 | 1.25 |  
| Median | 1 |  
| Decile 4 | 0.5 |  
| Decile 3 | 0 |  
| Decile 2 | -0.75 |  
| Decile 1 | -2 |  
| Minimum | -17.5 |  
 
 | 
 
 | 
- Mean = 0.70358
 
- Std.dev = 2.42972
 
- 154 items below graph minimum of -7.25
 
- 34 items above graph maximum of 8.5
 
  | 
 
2 Instances
Instance 2 : Imaging visit (2014+)
3,498 participants, 3,498 items
| Maximum | 10 |  
| Decile 9 | 3.25 |  
| Decile 8 | 2.25 |  
| Decile 7 | 1.75 |  
| Decile 6 | 1.25 |  
| Median | 1 |  
| Decile 4 | 0.5 |  
| Decile 3 | 0.25 |  
| Decile 2 | -0.5 |  
| Decile 1 | -2 |  
| Minimum | -14.25 |  
 
 | 
 
 | 
- Mean = 0.796241
 
- Std.dev = 2.42074
 
- 26 items below graph minimum of -7.25
 
- 6 items above graph maximum of 8.5
 
  | 
Instance 3 : First repeat imaging visit (2019+)
13,305 participants, 13,305 items
| Maximum | 13 |  
| Decile 9 | 3 |  
| Decile 8 | 2.25 |  
| Decile 7 | 1.75 |  
| Decile 6 | 1.25 |  
| Median | 0.875 |  
| Decile 4 | 0.5 |  
| Decile 3 | 0 |  
| Decile 2 | -0.75 |  
| Decile 1 | -2.25 |  
| Minimum | -17.5 |  
 
 | 
 
 | 
- Mean = 0.679218
 
- Std.dev = 2.4315
 
- 113 items below graph minimum of -7.5
 
- 32 items above graph maximum of 8.25
 
  | 
 
Notes
Left eye prescription is defined here as Median spherical equivalent value (left) + 0.75
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