Introduction: Laser iridotomy in treatment of chronic angle closure glaucoma has been increased during recent years and despite its preference, it has same complications. One of the important complications is intraocular pressure rising. To determine the relation between consumed total energy during Nd: YAG peripheral iridotomy and frequency of intraocular pressure rising this study has been done.
Material & Methods: In this descriptive study on results of Nd: YAG peripheral iridotomy in 275 eyes from 190 patients that was done in Labbafinejad medical center laser ward, effects of diagnosis (chronic angle closure glaucoma or narrow angle) and amount of total energy on intraocular pressure rise one and three hours following Nd: YAG peripheral iridotomy was evaluated.
Results: This study was shown no relation between diagnosis and intraocular pressure rise following Nd: YAG peripheral iridotomy but with increase in total energy greater than 400 m.j intraocular pressure rising (≥5 mm Hg) three hours after iridotomy was statistically significant (P<0.05). If total energy reached 700 m.j this meaningful intraocular pressure rising was detected one hour after iridotomy.
Conclusion: For avoidance of intraocular pressure rise following Nd: YAG peripheral iridotomy we recommend total energy lesser than 400 m.j and especially lesser than 700 m.j.