Table 2. Construct valid metrics for task-capsulorhexis, level of difficulty-5, repetition-2.
| Metric | Construct valid | Benchmark level (median of experienced 2nd repetition) |
|---|---|---|
| Global score | ✓ | 76 |
| Time (s) | ||
| Time (pts) | ||
| Time with instruments (s) | ||
| Incision stress (value) | ||
| Incision stress (pts) | ||
| Average radius of capsule (value) | ||
| Radius deviation from reference 2.5 mm (value) | ✓ | 0.03 |
| Radius deviation from reference 2.5 mm (points) | ✓ | 13.5a |
| Decentration (value) | 1.30a | |
| Decentration (points) | ✓ | 1.28a |
| Overall irregularity (value) | ||
| Overall irregularity (points) | ✓ | |
| Local irregularity spikes (value) | ✓ | 0a |
| Local irregularity spikes (points) | ✓ | 0a |
| Maximum radial extension (value) | ✓ | 0.31 |
| Maximum radial extension (points) | ✓ | 94.1a |
| Lens damage (value) | ✓ | 3.185 |
| Injured cornea area (value) | ||
| Injured cornea area (points) | ||
| Non-horizontal instruments insertion (number of events) | ||
| Non-horizontal instruments insertion (points) | ||
| Open forceps instrument insertion (number of events) | ||
| Open forceps instrument insertion (points) |
a
Metrics not included in the curriculum (Figure 3).