Posters
Objective evaluation of red reflex intensity and stability between nearly-collimated beam and focused-beam microscope illumination systems for cataract surgery
Poster Details
First Author: R. Dimalanta UNITED STATES
Co Author(s): D. Lubeck
Abstract Details
Purpose:
To develop testing techniques and criteria for the comparison of the red reflex produced by the illumination systems of ophthalmic surgical microscopes with nearly-collimated beam vs. focused-beam illumination and the effect of the red reflex on the quality of illumination for cataract surgery.
Setting:
Center for Minimally Invasive Surgery, Mokena, IL, USA
Methods:
This evaluation consisted of analysis of postproduction surgical video of red reflex intensity and range (or stability). Microscopes with a nearly-collimated beam illumination system and a focused-beam illumination system were assessed. A novel application of a video imaging program allowing measureable analyses of viewing quality and red intensity quantification is demonstrated. Light intensity, magnification, and video (and image) calibration were standardized.
Results:
Red reflex intensity and stability were greater with the nearly-collimated microscope illumination system in both video observation and postproduction image analyses.
Conclusions:
An innovative method in creating testing criteria/techniques for microscope illumination systems was demonstrated. The microscope with nearly-collimated illumination was observed to produce a more intense and more stable (wider range) red reflex than the focused beam microscope. Quantitative evaluation of red channel measurements from video capture favor near-collimated over focused-beam microscopes.
Financial Disclosure:
One or more of the authors is employed by a forNONEprofit company with an interest in the subject of the presentation, One or more of the authors receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented
