About Keratoconus

What is Keratoconus

Keratoconus (KC) is a condition of the eye meaning conical cornea. It is a rare condition. Numbers affected vary between 1 in 3,000 and 1 in 10,000 depending on where they live. It usually affects both eyes, although one eye is normally affected before the other.  KERATOCONUS literally means “conical or cone-shaped cornea” and it is a condition that affects vision. – Continue Reading…

Corneal Collagen Cross Linking (CXL)

Developed in Switzerland and Germany since 1998, corneal collagen crosslinking (C3R or UV-X) uses ultraviolet light with riboflavin dye to stiffen the cornea. This is the only treatment to treat the underlying cause of keratoconus. It works by linking the protein fibres in the cornea to each other and within themselves. This stops progression in all corneas so long as the cornea isn’t too thin or too steep to start with, and it cannot be used on significantly scarred corneas. Total UV exposure is similar to a day’s mountain walking.  – Continue Reading…

Hydrops and Keratoconus

A few KC group correspondents have had a hydrops recently. Acute hydrops episodes come out of the blue, often at night with not even any warning signs the evening before. The acute phase can be very uncomfortable, or extremely painful may be a closer description. The vision is suddenly misty, or in bad cases, a complete white out. The posterior membrane of the cornea suddenly splits and water from inside the eye cascades into the corneal stroma causing severe oedema, often with mini blisters which progress through the cornea to the epithelium at the front. There are lots of nerve endings in the epithelium: that is why it is so painful.  – Continue reading…

Intacs and Ferrara Rings

Perspex ring implants placed in the cornea to flatten and make more regular the shape of a keratoconic cornea. There are two main types: Intacs which sit further out and cause less glare and Ferrara rings.   – Continue reading…

When to go for a Transplant

Corneal transplants have been refined to an exceptionally high level of expertise over the years, and KC is one of the most commonly encountered indications. For other conditions, the surgeon is usually dealing with a seriously unhealthy cornea which may be opaque and vascularised. In such cases, there is much to gain and nothing to lose from the standpoint of achieving a visual improvement, but there is a high risk of rejection and transplant failure from other complications.  – Continue reading…