We treated 49 eyes of 39 patients, 10 patients had glaucoma in both eyes. The main characteristics of study group were summarized in table 1. Mean age was 46 ± 23.4. Gender was distributed as 40.8% (n 20) male and 59.2% (n 29) female. The sample was categorized according to glaucoma type as following:: primary open angle glaucoma (POAG) 30 (61%), neovascular glaucoma (NVG) 8 (16.4), congenital glaucoma (n) 8 (16.4), traumatic induced glaucoma 2 (4%), silicon oil induced glaucoma 1 (2%)
9 eyes have had previous glaucoma surgery (trabeculectomy, Ahmad valve). one eye had Ozurdex implant,4 eye had previous vitrectomy /silicon oil, and one eye had corneal transplant.
35 (71%) eyes had good visual acuity 0.05 or more (on Tumble E chart) which considered a good visual potential. 10 (20%) eyes their patients were incorporated, 2 (4%) was NLP (no light perception), 2 (4%) was LP/HM (light perception / hand motion). At end of follow up the visual acuity was remained stable in all patients’ eyes without decline and without any report of vision loss.
The mean pre-operative IOP was 38.2 ± 11.4 mm Hg. The mean post-operative IOP at 1 week was 25.3 ± 8.4 mm Hg and at the end point was 18.7 ± 7.5 mm Hg (P = 0.000). Average IOP at end point was reduced by 19.5 mm Hg (51 %)
The mean follow up was 6.5 months (max 20 and min 2), the mean number of sessions needed was 2.38 (max 6 and min 1).
The success rate was defined as 25% reduction. The patients were monitored after one week, one month, two months, three months, six months, and 12 months. Retreatment sessions were secluded at any point the IOP was more than 21 mm Hg.
24 (49%) patients were followed for less than 6 months. 25 (51%) were followed form 6 months to 20 months. The mean IOP reduction according to follow up were summarized in the table2.
28.6% of treated eyes needed only one session while 70.4% needed more than one session. The mean IOP reduction according to treatment session was summarized in Table 3.
IOP reduction rate were similar in different glaucoma type (Table 4,Figure 2). Also, the mean follow-up periods were close to each other in all types (Table 5).One eye had hypotony which was transient and improved after one week.