Keratoconus is an eye disorder that causes progressive thinning and bulging of the cornea, the clear, dome-shaped surface that covers the front of the eye. This can lead to distorted vision, nearsightedness, astigmatism, and other visual problems.

The exact cause of keratoconus is unknown, but it is thought to be related to a combination of genetic and environmental factors.

Symptoms of keratoconus may include:

1. Blurred or distorted vision
2. Increased sensitivity to light and glare
3. Difficulty seeing at night
4. Eye strain and fatigue
5. Frequent changes in eyeglass or contact lens prescriptions
6. Headaches

Treatment for keratoconus may depend on the severity of the condition and the individual's specific needs. Some options may include:

1. Glasses or contact lenses: In the early stages of keratoconus, glasses or soft contact lenses may help correct vision problems.
2. Rigid gas-permeable contact lenses: As the condition progresses, rigid gas-permeable contact lenses may provide better vision correction by conforming to the irregular shape of the cornea.
3. Corneal cross-linking: This procedure involves applying riboflavin drops to the cornea and exposing it to UV light to strengthen the collagen fibers and halt the progression of keratoconus.
4. Intacs: These are small plastic inserts that are surgically placed in the cornea to flatten and stabilize the shape of the cornea.
5. Corneal transplant: In severe cases, a corneal transplant may be necessary to replace the damaged cornea with a healthy donor cornea.

If you are experiencing symptoms of keratoconus, it is important to see an eye care professional for a comprehensive eye exam and appropriate treatment options.

No one knows what causes keratoconus, although genetic and environmental factors are thought to be involved. Around 1 in 10 people with keratoconus also have a parent with the condition.