Dispersive type of ophthalmic viscosurgical devices (OVDs): (a) 3 seconds: OVDs remain fully on the corneal endothelium. (b) 25 seconds: the OVDs remain on the side of the anterior chamber side in an irregular shape, as if the OVDs had dripped down the side (arrow). (c) 30 seconds: cross-sectional view of the tip (red arrow indicates OVDs). Air is trapped in the OVD (blue arrow indicates airs). (d) 90 seconds: the OVDs remain on the side of the corneal endothelium.