Signs and symptoms of keratoconus may change as the disease progresses. They include:
Blurred or distorted vision with progressive short sightedness
Increased sensitivity to bright light and glare
Problems with night vision
Sudden worsening or clouding of vision, caused by a condition in which the back of your cornea ruptures and fills with fluid (hydrops)
The cause of keratoconus remains unknown. However, it is believed to be an inherited condition or due to some endocrine anomaly. Excessive eye rubbing and poorly fitted contact lenses have also been implicated as causative factors.