Frequency of post-operative hypotony after 23-gauge transconjunctival vitrectomy with locally made instruments

The objective of this study was to discern the frequency of post-operative hypotony after 23-gauge vitrectomy with locally made instruments. This study was conducted at the Department of Ophthalmology, Lahore General Hospital, Lahore from July 2012 to June 2016. A total of 300 patients underwent 23-gauge pars-plana vitrectomy. Locally made 23-gauge trocar cannula system was used in all the patients. Post-operative Intraocular Pressure(IOP) was measured using Goldman Applanation Tonometer on the first post-operative day. IOP of less than 06mmHg was termed as hypotonic. In our study, mean post-operative intraocular pressure was recorded as 8.32±3.04mmHg and frequency of post-operative hypotony after 23-guage vitrectomy with locally made instruments reveals 10.67% (n=32) while 89.33% (n=268) had no findings of hypotony. We concluded that the frequency of post-operative hypotony after 23-gauge vitrectomy with locally made instruments is slightly higher when compared with other studies and this instrument can be used for further surgeries.