Method for performing ophthalmic laser surgery
CA 1300689 C · Owner: Visx Incorporated · Inventors: L'Esperance, Francis A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention contemplates controlled ablation of the cornea, using ultraviolet laser radiation wherein, irradiated flux density and exposure time are so controlled as to achieve desired depth of the ablation. Sculpturing action results from controlled change of projected laserspot size, in the course of a given treatment wherein, in one illustrative case, projected laser-spot size ranges from a maximum which covers the entire area to be treated down to a predetermined minimum tolerable size wherein, cornea-curvature change is myopia-corrective. Further illustrative techniques and situations are also disclosed for achievement of hyperopia correction for astigmatism, correction, and in …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.