Yag laser iridotomy was performed immediately after argon laser application in 59 eyes with chronic angle closure glaucoma, occludable angle and secondary glaucoma. Postoperative intraocular pressure was elevated temporarily more than 5 mmHg on 86.4% of patients. Iris haemorrhages occurred in 17% of cases when laser Yag iridotomy was carried out with a power of 4 to 6 mJ. Prior argon laser seemed to prevent iris haemorrhages.