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  • Title: Pseudophakic negative dysphotopsia: Surgical management and new theory of etiology.
    Author: Masket S, Fram NR.
    Journal: J Cataract Refract Surg; 2011 Jul; 37(7):1199-207. PubMed ID: 21700100.
    Abstract:
    PURPOSE: To evaluate the benefit of various surgical methods to address pseudophakic negative dysphotopsia. SETTING: Private practice, Los Angeles, California, USA. DESIGN: Interventional case series. METHODS: The following 4 surgical methods were used to treat negative dysphotopsia: secondary piggyback intraocular lens (IOL) implantation, reverse optic capture, in-the-bag IOL exchange, and iris suture fixation. Ultrasound biomicroscopy (UBM) was used to analyze posterior chamber anatomy. The primary outcome was partial or complete resolution of the negative dysphotopsia symptoms 3 months postoperatively. RESULTS: Twelve eyes of 11 patients with negative dysphotopsia had surgical treatment. All 10 patients who had piggyback IOL implantation or reverse optic capture had partial or complete resolution of symptoms by 3 months. No patient who had in-the-bag IOL exchange (n = 3) or iris suture fixation of the capsular bag-IOL complex (n = 1) improved despite alteration of IOL material or edge design in the case of IOL exchange or UBM confirmation of posterior chamber collapse in the case of iris suture fixation of the capsular bag-IOL complex. CONCLUSIONS: Consistent with a new hypothesis, resolution of negative dysphotopsia symptoms depended on IOL coverage of the anterior capsule edge rather than on collapse of the posterior chamber alone. Furthermore, negative dysphotopsia was not attributed to a particular IOL material or edge design. .
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