US 6,982,090 B2
More easily visualized punctum plug configurations
Donald E. Gillespie, 4629 Platt Rd., Ann Arbor, Mich. 48108 (US)
Filed on May 10, 2001, as Appl. No. 9/852,519.
Prior Publication US 2002/0169409 A1, Nov. 14, 2002
Int. Cl. A61B 3/16 (2006.01); A61B 8/10 (2006.01); A61F 2/14 (2006.01)
U.S. Cl. 424—427 8 Claims
 
1. A punctum plug which is more easily visualized when positioned within a punctual canal, the plug comprising:
a body having an outwardly exposed surface when so positioned; and
a substance causing at least the outwardly exposed surface to contrast with surrounding tissue, such that the use of the substance causes the plug to be more easily visualized than if the substance were not present.