Blur due to Irregular Cornea

Refractive surgery, corneal transplants, infections and corneal syndromes like Keratoconus are among the many potential causes for irregular corneas. An irregular cornea results in symptoms of blur and distortion that glasses and most contact lenses are unable to correct.  Visual symptoms from an irregular cornea are constant, but often worsen in dim light when the pupil is more dilated.
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