Zernike aberration coefficients for myopic LASIK subject S-RH as a function of horizontal visual field position in (a) third and (b) fourth orders for a 6-mm entrance pupil (symbols joined by solid lines). Zernike aberration coefficients $c_3^1$ and $c_4^0$ for a Navarro model eye, modified to have an anterior cornea with the subject's conicoid parameters ( $R8.43\mathrm{mm}$ , $Q+1.49$ ), and with a compensating change in axial length, are also shown (diamonds joined by dots).