Keratoconus Athens Protocol

The Athens Protocol is one of the most advanced combined approaches to keratoconus treatment.
The method combines Topography-Guided Laser (PRK) to reshape the corneal surface with immediate Cross-Linking (CXL) to biomechanically strengthen the cornea.

In other words, this protocol:

Both corrects the cornea and halts the progression of the disease.

This is what sets it apart from treatments that use cross-linking alone.

Why Is Cross-Linking Alone Not Enough?

Cross-linking is highly effective at stopping the progression of keratoconus.
However, in many patients the corneal surface is already significantly irregular.

In that situation:

• The disease is halted
  
  
• But visual quality remains poor
  
  

This is precisely where the Athens Protocol comes in.

The Rationale Behind the Athens Protocol

The core objectives of this approach are:

1. Reducing corneal surface irregularity
   
   
2. Reducing irregular astigmatism
   
   
3. Making the corneal surface more symmetrical
   
   
4. Then stabilising the cornea with cross-linking
   
   

The result: vision improves and the disease is arrested.

What Does Topography-Guided Laser (PRK) Do?

This laser treatment is personalised to each patient.
Unlike standard laser procedures, it works from a detailed map of your cornea.

• It smooths elevated areas
  
  
• It compensates for depressed areas
  
  
• It creates a more regular surface
  
  

The result: light focuses on the retina more uniformly.

Immediately Followed by Cross-Linking

Once the corneal shape has been refined with the laser, cross-linking is performed in the same session.

This step:

• Makes the new shape permanent
  
  
• Strengthens the corneal structure
  
  
• Halts disease progression
  
  

What Does the Athens Protocol Achieve?

Thanks to this combined treatment:

• The cornea becomes more symmetrical
  
  
• Irregular astigmatism is reduced
  
  
• Double vision and ghosting are significantly reduced
  
  
• Night vision improves
  
  
• Dependence on glasses and contact lenses may decrease
  
  

Who Is a Candidate?

The Athens Protocol is particularly effective for patients who:

• Are suitable candidates for cross-linking
  
  
• Have a highly irregular corneal surface
  
  
• Cannot achieve clear vision with glasses
  
  
• Have significant irregular astigmatism
  
  

At Which Stage of Keratoconus Can the Athens Protocol Be Performed?

The Athens Protocol is not appropriate for every keratoconus patient.
It delivers the best outcomes at the right stage and with adequate corneal thickness.

Because the procedure involves both topography-guided laser and cross-linking, certain safety thresholds must be met before any work can be performed on the cornea.

Optimal Stage: Early to Moderate Keratoconus (Stage 1–2, and selected Stage 3 patients)

The Athens Protocol is most effective in patients who:

• Have adequate corneal thickness
  
  
• Have stable or slowly progressing disease
  
  
• Have a visibly irregular corneal surface
  
  
• Have reduced corrected visual acuity with glasses
  
  
• Have significant irregular astigmatism
  
  

At this stage, the goal is:

Not merely to halt the disease, but to improve visual quality as well.

Why Can It Not Be Performed at an Advanced Stage (Stage 4)?

In advanced keratoconus:

• The cornea is severely thinned
  
  
• The cone is very pronounced
  
  
• There is insufficient safe tissue remaining for laser treatment
  
  

In these cases the Athens Protocol carries significant risk and is not the preferred approach.
These patients are typically considered for corneal transplantation.

What About Stage 3 Patients?

In selected Stage 3 patients:

• Where corneal thickness is borderline but sufficient
  
  
• Where the cone is not excessively steep
  
  

the Athens Protocol can be performed with careful planning.
This decision is based entirely on corneal topography and corneal thickness mapping.

Can It Be Performed in Children and Young Patients?

Yes — and in younger patients it is particularly valuable.
Because:

• The disease progresses more rapidly
  
  
• Visual quality deteriorates earlier
  
  

Where corneal thickness is adequate, the Athens Protocol can both halt progression and improve vision.

How Is the Final Decision Made?

Disease stage alone is not sufficient. The decision is based on the following assessments:

• Corneal topography
  
  
• Corneal thickness mapping (pachymetry)
  
  
• Degree of irregular astigmatism
  
  
• Level of visual acuity
  
  

This evaluation determines whether the Athens Protocol can be performed safely.

Is the Athens Protocol Suitable for Young Patients?

Yes. In young patients with an appropriate corneal profile, the Athens Protocol can be performed safely — and young patients are often the group that benefits most.

Keratoconus typically:

• Begins most commonly during adolescence and in the 20s
  
  
• Progresses more rapidly at these ages
  
  
• Causes marked deterioration of visual quality at an