Biconic ablation with controlled spherical aberration
OwnerGerhard Youssefi, Friedrich Moritzinventors
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Abstract
A laser vision correction ablation algorithm relies upon the central radius of curvature and a biconic shape factor of a pre-operative and a post-operative anterior corneal surface. The post-operative shape factor is selected to provide a spherical aberration value that is optimized for a particular patient or for a particular patient population group. The algorithm is embodied as a readable, executable instruction in a device readable medium. The algorithm further sets forth a method for laser vision correction.
Claims52
A laser vision correction ablation algorithm, comprising:
- determining a pre-operative surface of the cornea from information consisting of a pre-operative central radius of curvature, R, and a pre-operative shape factor, Q;
- determining a desired refractive correction, D;
- determining a desired post-operative surface having a central radius of curvature, R′, and a desired post-operative shape factor, Q′, wherein Q′ is a biconic shape factor.
A device readable medium for use with a laser vision correction system having stored therein a readable instruction for directing the laser vision correction system to execute an algorithm, said algorithm comprising:
- determining a pre-operative surface of the cornea from information consisting of a pre-operative central radius of curvature, R, and a pre-operative shape factor, Q;
- determining a desired refractive correction, D;
- determining a desired post-operative surface having a central radius of curvature, R′, and a desired post-operative shape factor, Q′, wherein Q′ is a biconic shape factor.
A method for providing a laser vision correction, comprising:
- determining a pre-operative surface of the cornea from information consisting of a pre-operative central radius of curvature, R, and a pre-operative shape factor, Q;
- determining a desired refractive correction, D;
- determining a desired post-operative surface having a central radius of curvature, R′, and a desired post-operative shape factor, Q′, wherein Q′ is a biconic shape factor.
Dependencies are inferred from the claim text.