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Many current corneal topography instruments (called videokeratographs) provide an &quot;acuity index&quot; based on cornealsmoothness to analyze expected visual acuity. However, post-refractive surgery patients often exhibit better acuity than ispredicted by such indices. One reason for this is that visual acuity may not necessarily be determined by overall cornealsmoothness but rather by having some part of the cornea able to focus light coherently onto the fovea.We present a new method of...

Wavefront coherence area for predicting visual acuity of post-PRK and post-PARK refractive surgery patients