Zernike radial slope polynomials for wavefront reconstruction and refraction.
Ophthalmic wavefront sensors typically measure wavefront slope, from which wavefront phase is reconstructed. We show that ophthalmic prescriptions (in power-vector format) can be obtained directly from slope measurements without wavefront reconstruction. This is achieved by fitting the measurement data with a new set of orthonormal basis functions called Zernike radial slope polynomials. Coefficients of this expansion can be used to specify the ophthalmic power vector using explicit formulas derived by a variety of methods. Zernike coefficients for wavefront error can be recovered from the coefficients of radial slope polynomials, thereby offering an alternative way to perform wavefront reconstruction.
Nam
Jayoung
J
1School of Optometry, Indiana University, Bloomington, Indiana 47405, USA. jnam@indiana.edu
Thibos
Larry N
LN
Iskander
D Robert
DR