low-light problems

Printing Instructions: To print this page, choose the "Print" option from the "File" menu in your menu bar. Select a printer and press the "OK" button. Coma When coma appears in a wavefront map, objects appear to have a comet-shaped pattern. Instead of a perfect sphere, the coma wavefront is asymmetric. This creates blurring in your vision. Spherical A spherical wavefront reflects a change in curvature between the center and edge of the pupil. This creates multiple focal points and has been known to cause a halo effect in your vision. Secondary Astigmatism An astigmatic wavefront reflects a complex, non-spherical pattern. This creates multiple focal points, which has a blurring effect on your vision. back to top