IOP: Un controlled IOP (≥ 21 mmHg): 4/36 eyes, (11.1%) Poor controlled IOP (>24 mmHg) even in case of anti-glaucoma eye drops have been employed: 2/36 eyes (5.5%) Effective controlled IOP (≤ 20 mmHg): 30/36, (83.4%) Complications: Flat anterior chamber, uveitis, cataract each of them has one case which occupies 2.7%. CONCLUSION The frequency of flat anterior chamber of NPT compared with trabeculectomy shows no statically differences.