When the cornea in the front of the eye, which normally is round, becomes thin and cone shaped. Sometimes the cornea in the front of the eye, which normally is round, becomes thin and cone shaped. Like nearsightedness or astigmatism this abnormal shape prevents light from focusing correctly on the retina.
What are the symptoms?
In its earliest stages which often appear in the late teens or twenties
keratoconus causes slightly blurred vision and increased sensitivity to bright
lights. As the disease progresses over ten or 20 years, vision may become more
and more distorted.
How can it be corrected?
In the early stages, eyeglasses or soft contact lenses can correct the
visual distortion. Later, as the disorder progresses, GP (gas permeable)
contact lenses may be preferable.