Evaluating Red Reflex and Surgeon Preference Between Nearly-Collimated and Focused Beam Microscope Illumination...

Area of Science:

• Ophthalmic surgery
• Surgical microscopy
• Optical engineering

Background:

• The red reflex is crucial for visualization during ophthalmic surgery.
• Microscope illumination systems vary, potentially impacting surgical performance and surgeon preference.

Purpose of the Study:

• To compare red reflex intensity and stability between nearly-collimated and focused illumination systems in ophthalmic surgical microscopes.
• To assess ophthalmic surgeon preference for these illumination systems in a simulated surgical environment.

Main Methods:

• Postproduction analysis of surgical videos to evaluate red reflex.
• A survey of 13 experienced cataract surgeons assessing microscope use and preference based on bench testing and simulated surgery.
• Comparison of one nearly-collimated and two focused beam microscope illumination systems.

Main Results:

• Nearly-collimated illumination systems produced a more intense and stable red reflex.
• Surgeons reported better red reflex maintenance at greater distances and improved depth of focus with nearly-collimated systems.
• Over 64% of surgeons preferred the nearly-collimated system for stability, depth of focus, visualization, working distance, and perceived patient comfort.

Conclusions:

• Microscopes with nearly-collimated illumination offer superior red reflex intensity and stability.
• The nearly-collimated system was preferred by the majority of surgeons for key surgical parameters, suggesting potential benefits for ophthalmic surgery.