One of the key challenges in penetrating keratoplasty

24/09/2025

One of the key challenges in penetrating keratoplasty (PK) is achieving suture precision that avoids inducing additional astigmatism. Even in experienced hands, the double running crossed diagonal suture (2 × 8 bites, Hoffmann technique) demands near-perfect accuracy – and a well-trained eye.
Uneven spacing or tension can lead to:
 

• post-op astigmatism

• wound instability

• irregular healing
  
  But what if visual estimation could be replaced with precise, reliable guidance?
  The Suffo / Homburg Model was developed for this exact purpose:
  
  A cross-stitch marker that helps surgeons place evenly spaced sutures with confidence and reproducibility.
  
  This specialized marker is designed to:

• Define exact entry and exit points

• Support highly regular and neutral suturing

• Eliminate dependence on visual guesswork

• Reduce suture loosening and repositioning

• Accelerate the learning curve

Promote early visual rehabilitation and topographic regularity.

Originally developed with Dr. Suffo (Homburg, Germany), the model has become a valuable tool for corneal surgeons focused on precision and consistency – even with the most demanding suture technique.