[The long-term effect of Nd:YAG laser iridotomy].

The IOP was controlled in 40 eyes (31 cases) of primary angle-closure glaucoma with Nd:YAG laser iridotomy. On follow-ups in 3 years, the differences in IOP, visual acuity, and the peripheral chamber depth from the preoperative values were very significant. The iridotomy hole closed spontaneously in 4 eyes. The success rates were 94% and 91% at 6 months and 2 years postoperative respectively, while it dropped to 82.4% at the end of third year.