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PURPOSE: To assess the relationship between ciliary body thickness and refractive error. DESIGN: Prospective observational case series. METHODS: We enrolled 75 eyes of 75 patients with no history of intraocular surgery or use of anti-glaucoma medication. Axial length was measured by A-scan ultrasonography. Ciliary body thickness (CBT) was measured by two masked observers on radial-section images of the temporal corneoscleral limbus, acquired with ultrasound biomicroscopy (UBM) at 2 and 3 mm posterior to the scleral spur (CBT2 and CBT3, respectively). RESULTS: Refractive error was inversely correlated with CBT2 and CBT3 (r=-0.64 and r=-0.52, P< .0001, respectively). Axial length was correlated with CBT (r=0.66 and r=0.57, P< .0001, for CBT2 and CBT3, respectively). CONCLUSION: CBT increases with increasing myopia and axial length.
PURPOSE: To assess the relationship between ciliary body thickness and refractive error. DESIGN: Prospective observational case series. METHODS: We enrolled 75 eyes of 75 patients with no history of intraocular surgery or use of anti-glaucoma medication. Axial length was measured by A -scan ultrasonography was measured by two masked observers on radial-section images of the temporal corneoscleral limbus, acquired with ultrasound biomicroscopy (UBM) at 2 and 3 mm posterior to the scleral spur (CBT2 and CBT3, respectively) ). RESULTS: Refractive error was inversely correlated with CBT2 and CBT3 (r = -0.64 and r = -0.52, P <.0001, respectively). Axial length was correlated with CBT (r = 0.66 and r = 0.57, P < 0001, for CBT2 and CBT3, respectively). CONCLUSION: CBT increases with increasing myopia and axial length.