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. Author manuscript; available in PMC: 2007 Sep 24.
Published in final edited form as: J Cataract Refract Surg. 2007 Jun;33(6):1051–1064. doi: 10.1016/j.jcrs.2007.02.021

Figure 1.

Figure 1

Wavefront aberrations in the normal cat eye. A. Photograph of a pre-operative feline eye and a sample feline spot array pattern (B) collected in the awake-behaving state using our modified Shack-Hartmann wavefront sensor. Note the shadow created over the spot array pattern by the upper eyelid is well beyond the 6mm analysis pupil used to measure wave aberrations. C. Pre-operative, lower-order wave aberrations for the 10 cats that underwent PRK as part of the present study. Note the small magnitude of lower order aberrations, including defocus (j=4) and the two astigmatism terms (j=3 and 5). D. Pre-operative Zernike coefficient values for higher order aberrations (up to 5th order Zernike coefficients, j=20) were also relatively low. In particular, note the small amount of spherical aberration (j=12) in our sample of cat eyes. Values are expressed as means ± SD.