---
title: Is PRESBYOND surgery suitable if corneal topography is abnormal?
description: "PRESBYOND is generally not suitable when corneal topography is abnormal, especially if there are signs of ectasia or significant irregularity. ## Why abnormal topography is a red flag It signals higher risk and unpredictability. - May indicate early keratoconus or…"
url: "https://bluefinvision.com/knowledge-base/topics/suitability/is-presbyond-surgery-suitable-if-corneal-topography-is-abnormal/"
updated: "2025-12-30"
category: Suitability
---

# Is PRESBYOND surgery suitable if corneal topography is abnormal?

PRESBYOND is generally not suitable when corneal topography is abnormal, especially if there are signs of ectasia or significant irregularity.

## Why abnormal topography is a red flag

It signals higher risk and unpredictability.

- May indicate early keratoconus or biomechanical weakness
- Further ablation can destabilise the cornea and worsen shape
- Blended‑vision profiles rely on a regular surface for good quality optics
- Risk of glare, ghosting, and reduced contrast increases
- Standard refractive guidelines treat suspicious topography as a contraindication

## Alternative management

Other strategies are preferred.

- Specialty contact lenses to optimise optics
- Cross‑linking where progressive ectasia is present
- Lens‑based presbyopia solutions in appropriate cases
- Use of reading or multifocal glasses for near tasks
- Close follow‑up by a corneal specialist instead of corneal laser