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Purpose To compare and evaluate the results of phacoemulsification surgery involving and not involving an ophthalmic-viscosurgical-device (OVD). Methods A prospective, randomized controlled trial included 60 eyes of 60 patients scheduled to receive phacoemulsification surgery. In order of presentation, patients were randomized into two groups to undergo different surgical techniques: the OVD-free group ( n = 30) and the OVD group ( n = 30). Each patient’s operating time, total ultrasonography (U/S) time, cumulative dissipated energy (CDE), aspiration time, and volume of balanced salt solution (BSS) aspirated were recorded. At 1 day, 1 week, and 1 and 3 months postoperation, measurements of endothelial cell density (ECD) and intraocular pressure (IOP), were taken and compared between the groups. Results Total U/S time ( p = .567) and CDE ( p = .168) were similar between the groups. In the OVD group, operating time ( p = .011), aspiration time ( p < .001), and volume of BSS aspirated ( p < .001) were greater than in the OVD-free group. The change in ECD between the groups was not statistically significant at all visits ( p = .433, p = .147, p = .379, p = .534; respectively). Although IOP increased in the OVD group at 1 day postoperation ( p = .001), no difference emerged between the groups at 3 months postoperation ( p = .121). Conclusion Phacoemulsification surgery without an OVD took less time than with the OVD and caused no significant loss in ECD. Surgeons concerned about elevated IOP following cataract surgery should apply the OVD-free method.
Akmaz et al. (Wed,) studied this question.