Figure 5
From: A miniature robotic steerable endoscope for maxillary sinus surgery called PliENT

Results of the NASA-TLX test for the 0° (blue) and 30° (green) rigid endoscopes and the PliENT endoscope (red) for each of the considered enlargement procedures. The mean score is indicated with a thick line, whereas the standard deviation is indicated with a transparent surface area.