Change of Intraocular Pressure Induced by Viscoelastics in Cataract Surgery with Intentional Posterior Capsule Ruptrue

The cataract surgery with viscoelastic agent was performed in forty eyes of twenty rabbits which were divided into two groups, one group with intact posterior capsule and the other group with ruptured posterior capsule of the lens, to evaluate the effect of viscoelastic agents on IOP according to presence of the intact posterior capsule of the lens after cataract surgery. The viscoelastics used were Healon in control group, and Healon, Viscoat and Occucoat in experimental group. We checked the IOP during one month. Peak IOP after surgery and the time from surgery to the peak IOP showed no difference between two groups. In experimental group, there was no difference in the change of postoperative IOP according to the kind of viscoelastics. Results suggest that the rupture of posterior capsule of the lens plays a role in delayed excretion of the viscoelastics, and the postoperative elevation of IOP was not different regardless of the physical difference of Viscoelastics.

Availability of Polyethylene Film for Reduction of Postoperative Adhesion in Adjustable Strabismus Surgery in Rabbits

Adjustable strabismus surgery sometimes fails because of changes in the angle of deviation which develops a few days after surgery. Therefore, the delayed adjustment was recommended; however, the postoperative tissue adhesion disturbed this delayed adjustment. We studied 20 eyes of 10 rabbits; adjustable strabismus surgery was performed on each of the right lateral rectus muscles by hemichangback technique for control study and the surgery on each left lateral rectus muscle was performed by same methods using polyethylene film. The polyethylene film was wrapped around the muscle allowing it to be placed between the muscle and sclera, and between the muscle and cojunctiva. The mean duration of postoperative tissue adhesion was 1.6 +/- 0.70 days in control group and 18.7 +/- 7.09 days in polyethylene group. These results suggested that the use of polyethylene film provides a valuable resource to defer the adjustment by preventing the postoperative tissue adhesion.