Accuracy of an automated refractor using a  Hartmann-Shack sensor after corneal refractive surgery and XXXX surgery.

@entity1 @entity231 @entity2516
PURPOSE: To evaluate the accuracy of a new automated refractor (HRK-8000A) using the Hartmann-Shack sensor in eyes with previous corneal refractive surgery or intraocular lens (IOLs) implantation. SETTING: Asan Medical Center, Seoul, South Korea. DESIGN: Retrospective nonrandomized clinical study. METHODS: @entity2516 were evaluated after more than 1 month postoperatively. Subjective @entity2516 were obtained by the same practitioner. @entity2516 were obtained with the Hartmann-Shack sensor refractor and a conventional refractor (KR  8800). RESULTS: There were 121 eyes (121 @entity1 ) with previous corneal refractive surgery and 122 eyes (122 @entity1 ) with previous @entity231 surgery. The results of @entity2516 measured by the Hartmann-Shack sensor refractor were more similar to subjective refraction than those measured by the conventional refractor in both groups. In both groups, the mean spherical equivalent (SE) for the subjective refraction showed better agreement with the automated refraction measured by  the Hartmann-Shack sensor refractor (limits of agreement [LoA], -0.66 to +0.65 diopters [D] and -0.47 to +0.41 D, respectively) than the automated refraction measured by the conventional refractor (LoA, -1.66 to +0.58 D and -1.34 to +0.60 D, respectively). In both groups, the Jackson cross-cylinder at axis 0 degrees and 45 degrees from the automated refraction by the Hartmann-Shack sensor refractor and conventional refractor showed similar agreement with the subjective refraction. CONCLUSION: The Hartmann-Shack sensor automated refractor gave reliable and valid objective refraction results in @entity1 who have had @entity231 or corneal refractive surgery. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
