Correction of hyperopia or astigmatism myopia by laser ablation

摘要

(57) apparatus for performing corneal refractive surgery due to partial resection of the corneal surface of the eye] [summary is provided. The apparatus includes a pulse laser for generating a pulsed output beam of light. Scanning mechanism scans the output beam, the output beams are linked functionally with the scanning mechanism, the output beam to scan a predetermined surface on which is defined by the cut layer boundary curve derived mathematically for each layer to. Control device are linked in function to the scanning mechanism in order to propagate to a predetermined surface output beam, excision boundary layer within the curve, resection layer boundary curve, and the center point of the output beam is on the outside of the resection layer boundary curve and so as to integrate the end of the ablation layer boundary curve in order to so as to be positioned within a predetermined distance from a certain point, but the closest one to the ablation layer boundary curve, the closer to the ablation desired shape.