Pur po se:To evaluate the results of previously described viscotrabeculotomy technique and to compare them with those of conventional trabeculotomy in longer-term follow-up. Ma te ri al and Met hod: This retrospective study included the eyes of 64 patients who underwent either viscotrabeculotomy (group 1) or conventional trabeculotomy (group 2) between February 1992 and April 2011. Group 1 consisted of 58 eyes of 34 patients who underwent viscotrabeculotomy surgery and group 2 consisted of 51 eyes of 30 patients who underwent conventional trabeculotomy. 3 patients (5 eyes) in group 1 and 2 patients (3 eyes) in group 2 left the follow-up for some reasons. At the last visit, group 1 comprised 53 eyes of 31 patients and group 2 comprised 48 eyes of 28 patients. Outcome measures were intraocular pressure (IOP), antiglaucomatous medications, horizontal corneal diameter, and success rate. Re sults: Success rates in group 1 at 12, 36, 60, 72, 96, 120 months, and at the last visit were 93.10%, 91.30% 89.30%, 87.00%, 84.90%, 83.00%, and 83.00%, respectively. The success rates in group 2 at the above-mentioned follow-up visits were 72.50%, 68.60%, 68.60%, 66.10%, 66.00%, 64.50%, and 62.50%, respectively. The success rate in group 1 was statistically significantly higher than in group 2 at the last visit (p=0.027). IOP and anti-glaucomatous medications at each follow-up examination were lower in group 1 compared to group 2, and these differences were with statistical significance (for each, p<0.05). Horizontal corneal diameters did not differ between the two groups in the postoperative follow-up. Dis cus si on: Viscotrabeculotomy has been found safer and more effective than classical trabeculotomy in longer-term evaluation. Viscodissection of the trabecular meshwork, viscodilation of the Schlemm's canal, keeping away the lips of trabeculotomy incision, and possibly prevention of postoperative hemorrhage and fibroblastic proliferation by means of high-viscosity sodium hyaluronate are the possible factors that play an important role in the overall success of this procedure. (Turk J Ophthalmol 2013; 43: 380-4) Özet Amaç: Daha önce tanımlanan viskotrabekülotomi tekniğinin daha uzun dönem sonuçlarını değerlendirmek ve konvansiyonel trabekülotomi ile karşılaştırmak. Ge reç ve Yön tem: Bu retrospektif çalışmaya Şubat 1992 ile Nisan 2011 tarihleri arasında viscotrabekülotomi (grup 1) ve geleneksel trabekülotomi (grup 2) ameliyatı uygulanan 64 hasta dahil edildi. Grup 1 viscotrabekülotomi uygulanan 34 hastanın 58 gözünden, grup 2 konvansiyonel trabekülotomi uygulanan 30 hastanın 51 gözünden oluşmaktadır. Grup 1'deki 3 hasta (5 göz) ve grup 2'deki 2 hasta (3 göz) çeşitli sebeplerden dolayı takiplerini bıraktı. Son vizitte, grup 1; 31 hastanın 53 gözünden, grup 2; 28 hastanın 48 gözünden oluşmaktaydı. Sonuç ölçütleri göz içi basıncı, anti-glokom ilaçları, horizontal kornea çapı ve başarı oranı olarak belirlendi. So nuç lar: Grup 1'in başarı oranları 12, 36, 60, 72, 96, 120. ayda ve son vizitte sırasıyla %93,10, %91,30 %89,30, %87,00...