Topically applied levobunolol does not cause changes in the corneal endothelium.

The corneal endothelium was examined in ten patients suffering from ocular hypertension before, during and after four months of topical levobunolol treatment. The untreated fellow eye served as a control. The number of endothelial cells, determined with a McIntyre eyepiece and an Eisner's contact lens, was not affected by levobunolol therapy. In addition, the morphology of the cell did not appear to be affected by the drug.