---
title: Is PRESBYOND surgery suitable if you have irregular corneas?
description: "PRESBYOND is usually unsuitable in significantly irregular corneas, because blended‑vision laser patterns require a regular surface for predictable optics. ## Why irregularity is problematic Outcomes become less reliable. - Irregular astigmatism increases higher‑order aberrations and ghosting - Laser may exacerbate…"
url: "https://bluefinvision.com/knowledge-base/topics/suitability/is-presbyond-surgery-suitable-if-you-have-irregular-corneas/"
updated: "2025-12-30"
category: Suitability
---

# Is PRESBYOND surgery suitable if you have irregular corneas?

PRESBYOND is usually unsuitable in significantly irregular corneas, because blended‑vision laser patterns require a regular surface for predictable optics.

## Why irregularity is problematic

Outcomes become less reliable.

- Irregular astigmatism increases higher‑order aberrations and ghosting
- Laser may exacerbate irregularity and reduce vision quality
- Irregular topography can indicate early ectasia, which laser may worsen
- Achieving a stable blended‑vision profile is technically difficult
- Patient satisfaction is often poor when irregularity is significant

## Alternative options

Other treatments manage irregular corneas better.

- Rigid, scleral, or hybrid contact lenses to smooth optical irregularity
- Topography‑guided procedures or cross‑linking in strictly selected cases
- Lens‑based refractive options combined with specialist contact lenses
- Ongoing monitoring for progression of irregularity
- Individualised care within a corneal specialist service