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Purpose: To evaluate the clinical effects and surgical techniques of Neodymium-yttrium, aluminum, garnet(Nd: YAG) laser therapy for persistent pupillary membranes., Methods: Twenty-five patients (26 eyes) with persistent pupillary membranes were suffered to resection membranes. The energy of laser was adjusted according to the thickness and density of the membranes. The laser with the best cutting effects and lowest energy was selected to resection. All patients were followed up for 3 - 6 months after the operation., Results: All patients were cured after one laser therapy. The corrected visual acuities were improved in different degrees. Three eyes were 0.6 - 0.7 (11.5%), 5 eyes were 0.8-0.9 (19.2%) and 18 eyes were > or = 1. 0 (69.2%). No complication was observed., Conclusion: The laser therapy for persistent pupillary membrane is an easy, safe and effective method only if the laser energy is appropriately selected, the focus is accurate and the operation is dexterity.

Purpose: To investigate a new way in the treatment of serious congenital persistent pupilary membrane., Methods: In four cases of six eyes, after temporal clear corneal tunnel incision was made, viscoelastic material was injected into the anterior chamber, and the persistent pupilary membrane was cut down at the very point connected to the iris., Results: There is no ocular hypertention and hyphema after operation. After one year's follow-up, the lens remained transparent in 3 cases(4 eyes). There was corneal astigmatism of 0.12 to 0.25 D after operation. And only a few corneal endothelial cells were lost., Conclusion: There are few postoperative complications and corneal astigmatism to incise congenital persistent pupilary membrane by temporal clear corneal tunnel incision. It is an ideal way to treat serious persistent pupilary membrane.

Purpose: In the cases of aphakia or cataract which complicated with iridosteresis, corectasis and pupil displacement, corepraxia was performed when implanting intraocular lens (IOL) in order to recover the normal shape and position of pupil, improve postoperative visual acuity and prevent monodiplopia and glare., Methods: In the cases which have iridosteresis at the direction of 9-3 oclock or updrawn pupil, iris suture was performed at the incision directly(open method); while those at the direction of 3-9 o'clock, operation was performed outside the anterior chamber (close method)., Results: In 22 cases, the percentage which having visual acuity better than 0.5 is 65%, having nearly round shape pupil 67%, having pupil diameter less than 3 mm 73%, having normal pupil position 67%., Conclusion: All kinds of deformed pupil can be recovered to their normal shape, size and position by performing corepraxia while IOL was implanted. The prolene has light reaction and better effect in iris suture.