Comparative evaluation of monocular augmented-reality display for surgical microscopes

Area of Science:

• Medical technology
• Surgical simulation
• Human-computer interaction

Background:

• Medical augmented reality (AR) systems are rapidly advancing.
• Quantitative comparisons of different AR display options for surgical tasks are lacking.
• Microsurgical procedures demand high precision and effective visualization.

Purpose of the Study:

• To quantitatively compare the effects of different graphical overlay display systems on surgical task performance.
• To evaluate positioning accuracy in a micromanipulation task using visual servoing with varying display types.
• To assess the impact of AR visualization on surgical error reduction.

Main Methods:

• A comparative study using the Micron active handheld tremor-canceling microsurgical instrument.
• Evaluation of three display systems: 2D screen, 3D screen, and microscope with monocular image injection (AR).
• Participants included surgical novices and an experienced vitreoretinal surgeon performing a visually-guided micromanipulation task.

Main Results:

• Displaying virtual cues directly within the microscope via an AR injection system significantly reduced 3D positioning error (p < 0.05).
• This improvement was observed compared to both 2D and 3D monitor displays.
• Results held true even after normalizing for confounding factors like magnification level.

Conclusions:

• Augmented reality visualization integrated into the surgical microscope enhances precision in micromanipulation tasks.
• Microscope-based AR displays offer superior performance over traditional 2D and 3D monitors for specific surgical guidance.
• This technology has the potential to improve surgical outcomes and reduce errors in delicate procedures.