Keratoconus is a progressive eye disease in which the normally regular cornea thins and begins to bulge into a cone-like shape. This cone shape distorts light as it enters the eye on its way to the light-sensitive retina, causing blurred vision.Keratoconus can occur in one or both eyes and often begins during a person’s teens or early 20s. Some of the main causes can be eye rubbing and genetics.Our Optometrist Patrick Madden is the only keratoconus-experienced Optometrist in Munster.Contact lenses are used to maintain the regular shape of the cornea, contact lenses do not slow down the rate of progression of the conical cornea, however they do give good vision during that period which could not of otherwise be achieved.