Table 2
Arden colour vision test in retinopathy
| Test results | Mild retinopathy | Advanced retinopathy | Normals |
|---|---|---|---|
| Sensitivity and specificity of the computerised Arden colour test to screen for chloroquine retinopathy. | |||
| *Cannot be assessed validly due to the low patient number. | |||
| Protan axis “abnormal” | 8 | 3 | 6 |
| Protan axis “normal” | 29 | 1 | 45 |
| Sensitivity 22% | Sensitivity 75% | Specificity 88% | |
| Tritan axis “abnormal” | 22 | 4 | 17 |
| Tritan axis “normal” | 15 | 0 | 34 |
| Sensitivity 60% | Sensitivity 100% | Specificity 67% | |
| Acquired colour defect | [3] | 1 | 3 |
| No acquired colour defect | [31] | 44 | |
| [Sensitivity 10%]* | * | Specificity 94% | |
