Power vectors: An application of Fourier analysis to the description and statistical analysis of refractive error
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Cites background from "Power vectors: An application of Fo..."
...The idea of blur strength is to think of the wavefront locally as a small piece of a quadratic surface for which a power vector representation can be computed (Thibos et al., 1997)....
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550 citations
Cites methods from "Power vectors: An application of Fo..."
...Progression of myopia was analyzed by expressing refractive error as three components: M (spherical equivalent), J0 (dioptric power of a Jackson cross cylinder at axis 0°), and J45 (dioptric power of a Jackson cross cylinder at axis 45°), as determined by Fourier decomposition.(16) Because oblique astigmatism is often mirror symmetric in the two eyes, the average J45 values were calculated by transforming the axis values between 91° and 180° to values between 0° and 90° for each eye and then averaging them between the two eyes....
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462 citations
Cites methods from "Power vectors: An application of Fo..."
...Progression of myopia was analyzed by expressing refractive error as 3 components: M (spherical equivalent), J0 (dioptric power of a Jackson cross cylinder at axis 0), and J45 (dioptric power of a Jackson cross cylinder at axis 45), as determined by Fourier decomposition.(19) The secondary outcome was change in axial length during follow-up relative to baseline measured by A-scan ultrasonography....
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426 citations
Cites background from "Power vectors: An application of Fo..."
...0 for 1cyl form, C , 0 for 2cyl form).(12)...
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...Power vectors are a geometrical representation of spherocylindrical refractive errors in 3 fundamental dioptric components.(12) The first component is a spherical lens with power M equal to the spherical equivalent of the given refractive error....
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