Method for the joining of ocular tissues using laser light
US5290272A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Mar 16, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00893
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An effective method for welding corneal and/or scleral tissues. To join the tissues, laser light is applied using a wavelength which enables penetration of the light to a tissue depth of about 0.2-2.0 mm. The wavelength is selected from within one of the following ranges: (1) 1400-1900 nm, or (2) 2100-2400 nm. In epikeratophakia procedures, the wavelength ranges will be 1900-2100 nm or 2400-2650 nm, allowing a tissue penetration depth of about 0.05-0.2 mm. A laser power output value is selected so that the tissue temperature during welding remains at about 44.degree.-60.degree. C. This value is between about 30 mW-1.5 W. The laser light may be applied in the form of a spot-type beam, an elongate beam, or an annular beam. Application of laser light in the foregoing manner enables ocular tissues to be safely and effectively welded, and is useful in corneal transplantation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.