A new method of analyzing vectors for changes in astigmatism

  • Alpins N
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This method of astigmatism analysis recognizes the need to define an astigmatism goal, thus allowing the surgeon to obtain precise, separate measures of the magnitude and the angle of surgical error. From this, the surgeon can evaluate what surgery may be required to achieve the initial preoperative goal. An index that measures surgical success is adjusted for the level of preoperative astigmatism. The resulting data allow statistical comparison of multiple surgeries and techniques. This method also assists in resolving the case when spectacle and corneal astigmatism do not coincide. © 1993, American Society of Cataract and Refractive Surgery. All rights reserved.

Author-supplied keywords

  • angle of error
  • astigmatism goal
  • astigmatism magnitude and axis
  • coefficient of adjustment
  • difference vector
  • index of success
  • magnitude of error
  • surgically induced astigmatism vector
  • targeted induced astigmatism vector
  • vector analysis

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  • Noel A. Alpins

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