Materials and Methods: 7 eyes of 7 consecutive patients in which 25-G TSV system was used for the first time, in which interventions like diffuse vitreoretinal dissection, silicone oil injection wouldn't be needed and pars plana vitrectomy (PPV) wouldn't last long were included in the study. Intraoperative complications, advantages and disadvantages compared to 20-G system were recorded. All cases were examined preoperatively and postoperatively on the 1st day, 1st week, at 1st, 3rd ,6th months and evaluated for best corrected visual acuities (BCVA), the changes in intraocular pressures (IOP), anatomical results of the surgeries, complications, irritative complaints.

Results: The mean age of 7 cases operated due to vitreous hemorrhage (VH) (n:6), recurrent macular hole (MH) (n:1) was 61±24.11. In one eye microcannula dropped onto the retina. Indoillumination was found to be weaker than the 20-G system in all eyes. No statistical difference (p>0.05) was detected between preoperative and postoperative mean IOP values. In none of eyes who were followed-up for a mean period of 7.85±1.21 months, evaluated complications or irritative complaints were seen. The mean postoperative BCVA was 0.25±0.16 in which an increase in BCVA was detected in all eyes.

Conclusion: In appropriate cases, 25-G TSV technique was found to be effective, sufficient and anatomical, functional success was achieved. Weak endoillumination is the disadvantage of this method. During the postoperative period, any additional complications related to system or irritative complaints were not observed. Keywords : 25-G transconjunctival sutureless vitrectomy, hypotony, endophtalmitis.