Clear Vision treats corneal ulcers and infections, keratoconus (with C3R collagen cross-linking and specialty contact lenses), corneal dystrophies and scarring, and performs corneal transplantation. A red, painful eye with blurred vision or a white spot on the cornea should be examined the same day — a corneal ulcer can perforate within days.
Keratoconus
In keratoconus the cornea progressively thins and bulges forward into a cone. Because the front surface of the eye does most of its focusing, even a small distortion there scatters vision badly. It typically begins in the teens or twenties, often affects both eyes unequally, and is strongly linked to habitual eye rubbing.
The tell-tale sign is a spectacle number, particularly the cylindrical part, that keeps changing and never quite gives sharp vision no matter how carefully it is measured.
Treatment has two separate jobs
| Stop it progressing | C3R collagen cross-linking. Riboflavin drops activated by controlled ultraviolet light strengthen the bonds between corneal collagen fibres, stiffening the cornea so it stops bulging further. |
|---|---|
| Make vision clear | Specialty contact lenses — rigid, scleral or hybrid designs that vault the irregular surface and create a smooth new optical surface. In advanced cases, a corneal transplant. |
These are not alternatives to each other. Cross-linking protects the future; lenses or a graft address the present. Most patients need both, in that order.
Corneal infections and ulcers
An ulcer is an open sore on the cornea, usually infected. It progresses fast, it hurts, and it scars. Because the cornea has no blood vessels, the body's normal defences reach it poorly, so treatment relies on intensive, correctly targeted drops — sometimes hourly, day and night, in the early phase.
Contact lens wearers are at particular risk, especially after sleeping in lenses, topping up rather than replacing solution, or letting tap water touch lenses or cases.
Never use leftover steroid drops on a painful red eye. In an infected cornea, steroids suppress the defence and accelerate the damage. This single mistake causes a meaningful share of the permanent corneal scarring we see.
Corneal transplantation (keratoplasty)
Where the cornea is scarred, clouded or dangerously thin, the damaged tissue is replaced with healthy donor tissue. Modern techniques frequently replace only the affected layer rather than the full thickness, which shortens recovery and reduces rejection risk.
Because the cornea has no blood vessels, corneal grafts are among the most successful transplants in all of medicine. Visual recovery is gradual over months, and anti-rejection drops continue long term.
Frequently asked questions
What is keratoconus and how is it treated?
Keratoconus is progressive thinning and cone-shaped bulging of the cornea that distorts vision. It usually begins in the teens or twenties and is strongly associated with habitual eye rubbing. Treatment has two aims: C3R collagen cross-linking halts progression, and specialty contact lenses or, in advanced cases, a corneal transplant restore clear vision.
Does C3R cross-linking improve vision?
C3R is a stabilising treatment, not a vision-correcting one. Its purpose is to stop keratoconus getting worse and protect you from needing a transplant later. Some patients see a modest improvement as the cornea flattens slightly, but the correct expectation is that vision stays roughly as it was and stops deteriorating.
Is a corneal transplant a major operation?
Modern techniques often replace only the diseased layer rather than the full thickness, which speeds recovery and reduces rejection risk. The cornea has no blood vessels, which is why corneal grafts are among the most successful transplants in medicine. Visual recovery is gradual over months, with anti-rejection drops used long term.
When is a red, painful eye an emergency?
A red eye with pain, light sensitivity, blurred vision or a visible white spot on the cornea should be examined the same day. A corneal ulcer can perforate the eye within days and can permanently scar the visual axis. Contact lens wearers are at particular risk. Never treat a painful red eye with leftover steroid drops.