Relation of acuity threshold to the use of vision tests other than distance acuity
Number of surgeons | Thresholds worse than 6/6 | Thresholds 6/6 or better | No acuity criterion |
Use any other test(s) routinely (a) | 96 | 50 | 22 |
Do not use other tests routinely (b) | 140 | 105 | 33 |
Percentage using other tests routinely [100×a/(a+b)] | 41% | 32% | 40% |
Use any other test(s) routinely or occasionally | 227 | 149 | 51 |
Do not use other tests | 9 | 6 | 4 |
Percentage using other tests routinely or occasionally | 96% | 96% | 93% |
Use near acuity tests routinely or occasionally | 225 | 149 | 51 |
Do not use near acuity tests | 10 | 6 | 3 |
Percentage using near acuity tests routinely or occasionally | 96% | 96% | 94% |
Use contrast sensitivity tests routinely or occasionally | 24 | 16 | 7 |
Do not use contrast sensitivity tests | 204 | 136 | 47 |
Percentage using contrast sensitivity tests routinely or occasionally | 11% | 11% | 13% |
Use glare tests routinely or occasionally | 29 | 14 | 5 |
Do not use glare tests | 193 | 139 | 48 |
Percentage using glare tests routinely or occasionally | 13% | 9% | 9% |
The missing values can be calculated by subtracting the total numbers in each of the five groupings from 473.