PRESBYOND‑style enhancements on post‑LASIK corneas are possible in selected patients, but require particularly cautious assessment.
When it may be considered
Safety and tissue reserve must be adequate.
- Stable post‑LASIK refraction with clear presbyopic symptoms
- Adequate residual stromal thickness and regular topography
- No signs of ectasia or flap complications
- Clear lenses and good retinal health
- Desire to avoid lens replacement at this stage
Special challenges
Re‑treatment carries extra risk.
- Less residual tissue available for further ablation
- Higher vulnerability to dry eye and night‑vision symptoms
- Altered corneal biomechanics compared with virgin corneas
- Need for highly experienced refractive surgeons and meticulous planning
- In some cases, lens‑based options are safer than additional corneal laser
