Table 1.

IOU, operation time, and focus shift using the proposed system and a monitor-based system.

Parameter	CPI-2 system	Monitor-based system	p*
Accuracy (IOU)†	0.94 ± 0.01	0.81 ± 0.03	p < 0.05
Operating time†, s	44.7 ± 7.8	96.3 ± 11.0	p < 0.05
Focus shift†, times	0	8 ± 1	p < 0.05

*Values of p < 0.05 are statistically significant

^†t-test