Keratoconus is a progressive eye condition in which the cornea thins and gradually bulges outward into a cone shape. This irregular shape distorts and blurs vision in a way that cannot always be corrected with standard spectacles. It typically begins in the teenage years or early twenties and may progress for ten to twenty years before stabilising. It affects both eyes in most cases, though often asymmetrically.

The exact cause is not fully understood, but keratoconus is thought to result from a combination of genetic and environmental factors. It is more common in people with a family history of the condition, those with atopic conditions such as eczema, asthma or hay fever, and in people who rub their eyes frequently. Eye rubbing is a significant modifiable risk factor and patients are strongly advised to avoid it. Keratoconus is also associated with certain connective tissue disorders.

Early symptoms include increasing short-sightedness, frequent changes in spectacle prescription, and mild blurring or ghosting of vision. As the condition progresses, patients often notice significant distortion, halos around lights, glare, and difficulty driving at night. Spectacles may become less effective at correcting vision, and contact lenses may be needed. In advanced cases, sudden painful vision loss can occur due to acute hydrops, a condition in which fluid enters the cornea.

Keratoconus is diagnosed through a combination of clinical examination and corneal topography or tomography, which provides detailed mapping of the corneal shape and thickness. These scans can detect early changes before symptoms become apparent. Miss Hala Ali uses advanced corneal imaging at her private clinics at Frimley Park Hospital, Camberley in Surrey, to provide a precise diagnosis and monitor progression over time.

In the early stages, vision can often be managed with spectacles or soft contact lenses. As the cornea becomes more irregular, rigid gas-permeable (RGP) contact lenses, hybrid lenses, or scleral lenses are typically needed to provide a smooth optical surface and improve vision. These non-surgical options manage symptoms only and do not halt progression. Corneal collagen cross-linking is the only proven treatment to slow or stop progression.

Corneal collagen cross-linking (CXL) is a minimally invasive procedure that uses ultraviolet light and riboflavin (vitamin B2) eye drops to strengthen the bonds within the corneal tissue, halting or significantly slowing the progression of keratoconus. It does not reverse existing distortion but prevents further deterioration. It is recommended for patients with documented progression of keratoconus, and is most effective when performed early. Miss Ali assesses suitability for cross-linking at her clinics in Frimley. The surgery is carried out in Frimley Theatres.

Corneal Allogenic Intrastromal Ring Segments (CAIRS) are small curved segments of donor corneal tissue that are implanted into channels within the cornea to flatten and regularise its shape. They can improve unaided and contact-lens-corrected vision in patients with moderate keratoconus who are struggling with contact lens tolerance. CAIRS are often combined with cross-linking to both improve vision and stabilise the cornea. Miss Hala Ali is experienced in this technique and can advise whether it is appropriate for your individual case.

A corneal transplant is considered when keratoconus has progressed to a stage where contact lenses can no longer provide adequate vision, or when the cornea has become too thin or scarred for other interventions. Modern lamellar techniques, such as deep anterior lamellar keratoplasty (DALK), replace only the front layers of the cornea while preserving the patient's own inner layer, reducing the risk of rejection compared to full-thickness transplants. Miss Ali is experienced in both DALK and penetrating keratoplasty and will discuss the most appropriate approach for each patient.

Yes, and contact lenses are often the most effective way to correct vision in keratoconus. As the cornea becomes more irregular, standard soft lenses may no longer provide adequate correction. Rigid gas-permeable (RGP) lenses, hybrid lenses (rigid centre with soft skirt), and scleral lenses, which vault over the entire cornea, are commonly used. Scleral lenses in particular can provide excellent vision even in advanced keratoconus and are well tolerated by most patients. Miss Ali can advise on the most suitable lens type and refer to specialist contact lens practitioners in Surrey and Berkshire.

Standard laser eye surgery (LASIK, LASEK, or PRK) is generally contraindicated in keratoconus because it removes corneal tissue and can accelerate thinning and progression. However, in carefully selected patients with very mild, stable keratoconus, limited surface laser treatment combined with cross-linking (a technique sometimes called CXL-plus) may be considered. This is a specialist decision that requires thorough corneal assessment. Miss Ali can advise whether any refractive procedure is safe and appropriate for your individual corneal profile.

Keratoconus does have a genetic component and can run in families, though it does not follow a simple inheritance pattern. First-degree relatives of someone with keratoconus have a higher risk of developing the condition. Screening with corneal topography is advisable for siblings and children of affected patients, particularly if they are in their teens or twenties. Early detection allows cross-linking to be performed before significant vision loss occurs.

Keratoconus affects both eyes in the majority of patients, though it is often asymmetric, with one eye potentially more advanced than the other. It is important to monitor both eyes regularly even if only one appears to be causing symptoms, as the less-affected eye can progress independently.

Keratoconus very rarely causes complete blindness. With appropriate specialist management, including contact lenses, cross-linking, ring segments, and if necessary corneal transplantation, the vast majority of patients maintain functional vision throughout their lives. The key is early diagnosis and timely intervention to prevent progression. Miss Ali's clinics in Frimley, Surrey and Heatherwood, Ascot are equipped to provide the full spectrum of keratoconus care.

The cost of private keratoconus treatment depends on the stage of the condition and the intervention required. An initial consultation costs £250. There is a further fee for the corneal tomography. Corneal collagen cross-linking is a day-case procedure; costs vary by hospital and technique. Many private medical insurance policies cover keratoconus treatment, so it is advisable to check your policy and obtain pre-authorisation before your appointment. Miss Ali's secretary can provide guidance on fees and insurance at the time of booking.

Miss Hala Ali holds private clinics at Frimley Park Hospital in Frimley, Surrey, which is serves patients from Camberley, Aldershot, Fleet, Farnham, Guildford and the surrounding Surrey areas. She also serves patients from Windsor, Bracknell, Maidenhead and across the Thames Valley. Online booking is available, or you can contact the secretary directly to arrange an appointment.