A method for inducing cylinder power into an optical surface which comprises the steps of providing a target optical surface to an apparatus capable of indexing the position of said target to the beam path of a laser capable of photoablating the material of said target, passing said target through the...http://www.google.co.uk/patents/US5061342?utm_source=gb-gplus-sharePatent US5061342 - Target domain profiling of target optical surfaces using excimer laser photoablation
