1. Quantification of Change in Axonal Birefringence Following Surgical Reduction in Intraocular Pressure

    Quantification of Change in Axonal Birefringence Following Surgical Reduction in Intraocular Pressure
    BACKGROUND AND OBJECTIVE The purpose of this study was to examine the hypothesis that retinal nerve fiber layer (RNFL) birefringence increases following surgical reduction of intraocular pressure (IOP). PATIENTS AND METHODS Twenty-six glaucomatous eyes requiring trabeculectomy or drainage implant were enrolled. Optical coherence tomography (OCT), scanning laser polarimetry (SLP), and IOP measurements were performed preoperatively and 3 months postoperatively. The OCT and SLP images were aligned using a new algorithm that aligns the vessels in an OCT image to those in the corresponding SLP reflectance image. The SLP retardance values at the location of the OCT scan circle were then ...
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