Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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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


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.


Center for Minimally Invasive Surgery, Mokena, IL, USA


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.


Red reflex intensity and stability were greater with the nearly-collimated microscope illumination system in both video observation and postproduction image analyses.


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

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