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Graefe's Archive for Clinical and Experimental Ophthalmology

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01-02-2013 | Retinal Disorders

Development and preclinical evaluation of a new viewing filter system to control reflection and enhance dye staining during vitrectomy

Authors: Hiroshi Enaida, Yoshiyuki Hachisuka, Yukiyasu Yoshinaga, Yasuhiro Ikeda, Toshio Hisatomi, Shigeo Yoshida, Yusuke Oshima, Kazuaki Kadonosono, Tatsuro Ishibashi

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 2/2013

Abstract

Purpose

We developed a new artificial image enhancement system and evaluated its usefulness in controlling intraoperative reflection and enhancing of Brilliant Blue G (BBG) staining.

Methods

The system was composed of three kinds of filters (a polarizing filter, a blue-enhancing filter, and a sharp-cut filter Y) and attached to the inferior surface of the operating microscope. Twenty-seven post-mortem extracted porcine eyes were used for a series of examinations. We performed surgery using the 23G-vitrectomy system with a halogen light and xenon lights and compared the reduction of intraoperative reflection under air condition and visibility and BBG contrast with and without this system. The evaluation of images was calculated in CIE 1976 (L*, a*, b*) color space (CIELAB) carried out by ImageJ software. The transmission of each filter and absorbance of BBG was measured by a spectrophotometer. We measured spectral irradiance at each wavelength about each filter from each light source with a spectroradiometer.

Results

Under both light sources, intraoperative reflection was controlled using a polarizing (PL) filter or combination of filters under air condition. Evaluation of the value of L* within the cutter surface was changed by 37.8 % under the halogen light, and 61.6 % (averaged) under the xenon light with inserted filters versus no filter. The BBG intensity difference was obtained with sharp-cut Y filter under both light source and PL with blue enhancing filter under the halogen light using each L*, a*, b* parameter with statistically significant (p < 0.01, 0.05). However, there was a relative decrease in the observation illuminance when the filter inserted according to the attenuation total spectral irradiance.

Conclusions

This system can reduce intraoperative reflections under the air condition and obtain an excellent BBG staining intensity induced by various light sources.

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Title: Development and preclinical evaluation of a new viewing filter system to control reflection and enhance dye staining during vitrectomy
Authors: Hiroshi Enaida
Yoshiyuki Hachisuka
Yukiyasu Yoshinaga
Yasuhiro Ikeda
Toshio Hisatomi
Shigeo Yoshida
Yusuke Oshima
Kazuaki Kadonosono
Tatsuro Ishibashi
Publication date: 01-02-2013
Publisher: Springer-Verlag
Published in: Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 2/2013
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI: https://doi.org/10.1007/s00417-012-2035-3

At a glance: The STEP trials

Springer Medicine

Development and preclinical evaluation of a new viewing filter system to control reflection and enhance dye staining during vitrectomy

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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