1. Intravitreal Colchicine Causes Decreased RNFL Birefringence without Altering RNFL Thickness

    purpose. To test the hypothesis that longitudinal differences between retinal nerve fiber layer (RNFL) birefringence, measured by scanning laser polarimetry (SLP), and RNFL thickness, measured by optical coherence tomography (OCT), are informative about the state of axonal degeneration. methods. Colchicine was injected into the vitreous cavity of one eye in each of six vervet monkeys (Chlorocebus sabaeus; estimated vitreal concentration: 1 mM, n = 3; 2 mM, n = 1; 10 mM, n = 2); an equivalent volume (approximately 0.1 mL) of sterile saline was injected into fellow control eyes. RNFL birefringence was measured by SLP before injection and every 10 minutes ...
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