Fig. 4From: Changes in choroidal thickness and optic nerve head morphology after filtering surgery: nonpenetrating deep sclerectomy versus trabeculectomyExample of morphological changes in optic nerve head after NPDS. Preoperatively, (a) lamina cribrosa depth was 445 μm and prelaminar tissue thickness was 42 μm. At 1 week (b), lamina cribrosa depth was 303 μm and prelaminar tissue thickness was 53 μm. At 1 month (c), lamina cribrosa depth was 354 μm and prelaminar tissue thickness was 53 μmBack to article page