Two techniques are commonly practiced:

  • Intrastromal corneal implants with a femtosecond laser overleaf incision has become the traditional technique. The advantage of this technique is its laser precision and reduced corneal trauma.
  • External tattooing with a needle dermograph is practiced using the traditional technique for leukoma correction. This technique is simple and can be used to implant multiple pigment colours. But it has two drawbacks:
    • Interstitial implantation is irreversible,
    • Altering the corneal epithelium has a slightly higher risk of post-operative effects (pain and time for healing by epithelial regeneration).
  • Combining the two techniques makes for a more natural appearance, multi-coloured like a natural iris: honey-coloured or green spots in a brown iris or bright blue spots in a steel-blue iris, for example.

Can results be predicted?

Dr. FERRARI of Strasbourg has developed a simulation program, NEORIS, allowing patients to visualize their faces after their eye colour has been changed. (

Technical limitations

  • A ring of natural iris colour (very hard to see) will be left inside the recoloured part, allowing you to see in low light conditions, when your pupils are dilated, without any visual impairment.
  • The procedure cannot be performed if your corneas are too thin (like for restorative keratopigmentation).
  • The procedure is not recommended for patients who are undecided or unenthusiastic, as complete reversibility cannot be guaranteed.

Images courtesy of Institut Beauté Extrême (Lausanne)

Surgeon Dr. FERRARI

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