In the 1995-2000 period, data of interest concerning preoperative and postoperative intraocular pressure (IOP) and the best corrected visual acuity (BCVA) in the group of eyes in which the brand name methylcellulose - Adatocel, Ocucoat, Metocel - (n=378) and Viscoat (n=526) was used during the surgery, were statistically evaluated. They were compared to those results obtained from the prospective clinical study performed in 2001-2002 (n=275) by using the new viscoelastic material Duo-Bonharen, which is the Czech product, manufactured on the basis of the hyaluronic acid. All groups were evaluated in a retrospective manner. In the comparative study, statistically significant differences in functional results of cataract surgery in favor of Duo-Bonharen were demonstrated. The cohesive type of the substance used tends to decrease the IOP, the dispersivematerials tend to increase the IOP.

        Key words: Hyaluronic acid, Duo-Bonharen, viscoelastic surgery.