Punctum plugs having fluid collecting recesses and methods of punctal occlusion
US6994684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2003 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jul 26, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/00772
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A punctum plug includes a distal tip, a proximal cap and a body connecting the tip to the cap. The cap has a proximal surface which remains exposed in the eye upon implantation of the punctum plug. A passage for an insertion tool extends distally in the punctum plug from an opening along the proximal surface. One or more recesses in the proximal surface collect tear fluid by surface tension, and each recess is laterally offset in its entirety from the opening and does not overlap or align with the opening. The number of recesses is indicative of the size of the punctum plug. A method of punctal occlusion involves collecting tear fluid in the one or more recesses and adhering the tear fluid in the one or more recesses by surface tension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.