Demonstration of aqueous streaming through a laser iridotomy window against the corneal endothelium

Archives of Ophthalmology
Yasuaki YamamotoYuichi Ohashi

Abstract

To determine the pathogenesis of the bullous keratopathy that is frequently observed in patients after argon laser iridotomy (ALI) by comparing the changes in aqueous flow after ALI with those that follow peripheral iridectomy in rabbit eyes. Silicone particles were injected into the anterior chamber of rabbit eyes as tracers to monitor aqueous flow. Particle tracking velocimetry with image analysis was used to determine the direction and speed of aqueous flow in 5 pigmented rabbits that underwent ALI and 5 that underwent peripheral iridectomy. In the ALI group, silicone particles were found to stream through the iridotomy window against the corneal endothelium immediately after the pupil was constricted by a light stimulus. The mean +/- SD speed of the particles was 2.97 +/- 1.51 mm/s. In contrast, the mean +/- SD flow rate through the iridectomy window in the peripheral iridectomy group was significantly slower at 0.36 +/- 0.30 mm/s (P = .01). Constriction of the pupil elicited marked aqueous streaming through the ALI window against the corneal endothelium. Clinical Relevance The mechanical stress to the corneal endothelium by the abnormal aqueous stream may be partially responsible for the corneal decompensation that follows...Continue Reading

Citations

Jul 10, 2012·Japanese Journal of Ophthalmology·Hiroshi ToshidaKazuhisa Sugiyama
Aug 1, 2006·Photomedicine and Laser Surgery
Jan 31, 2012·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Masatoshi HirayamaJun Shimazaki
Jul 11, 2008·American Journal of Ophthalmology·Akira KobayashiKazuhisa Sugiyama
Feb 18, 2014·Acta Ophthalmologica·Priscilla X WangSeng Chee Loon
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May 27, 2021·International Ophthalmology·Sofia FiliMarkus Kohlhaas
Jul 25, 2021·Biomechanics and Modeling in Mechanobiology·R AgujetasJ M Montanero

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