Temporary pupil rings useful in complicated MICS

The use of temporary pupil rings for pupil dilation during microincision cataract surgery (MICS) is particularly useful in cases with floppy iris syndrome, according to Boris Malyugin from the S. Fyodorov Eye Microsurgery Complex, Moscow, Russia.

Dr Malyugin and co-workers developed a new temporary pupillary ring that uses the scroll principle of iris margin capture. A total of 59 MICS procedures were carried out in subjects with cataract complicated by glaucoma, pseudoexfoliative syndrome, diabetes and uveitis. Procedures were performed using a 2.2 mm wide incision coaxial MICS. In the control group (32 eyes), conventional iris hooks were used while, in the study group (27 eyes), the temporary pupil expander rings were used.

Intra- and postoperative complications were comparable, with slightly fewer noted in the study group.

The results demonstrated that the temporary pupil ring offered superior endothelial cell protection and decreased hyphemas, fibrinoid reactions and early postoperative hypertension.

The researchers concluded that the use of the temporary pupil ring is a reasonable option for pupil dilation during MICS especially in the cases with floppy iris syndrome.