---
title: Is ICL surgery suitable for one eye only (monocular)?
description: "[ICL implantable contact lens surgery](https://bluefinvision.com/blog/what-is-icl-surgery-video-blog/) can sometimes be performed in just one eye, but this needs careful assessment. ## When monocular ICL may help Occasionally one eye has a much higher prescription or different focusing need. Treating that eye alone…"
url: "https://bluefinvision.com/knowledge-base/topics/suitability/is-icl-surgery-suitable-for-one-eye-only-monocular/"
updated: "2026-01-22"
category: Suitability
---

# Is ICL surgery suitable for one eye only (monocular)?

[ICL implantable contact lens surgery](https://bluefinvision.com/blog/what-is-icl-surgery-video-blog/) can sometimes be performed in just one eye, but this needs careful assessment.

## When monocular ICL may help

Occasionally one eye has a much higher prescription or different focusing need. Treating that eye alone can balance vision and reduce dependence on glasses.

- Best considered when the untreated eye already sees well without correction
- Useful when laser surgery is not suitable because of thin corneas
- Helps some patients with large differences between the two eyes anisometropia
- Pre-operative trial with contact lenses can simulate the effect

## Key considerations for single-eye ICL

The brain must comfortably combine images from both eyes. Surgeons weigh visual benefit against surgical risk for an otherwise healthy fellow eye.

- Some people may notice imbalance or depth-perception changes
- Long-term monitoring is needed for pressure, cataract, and lens position
- Patients must understand that future surgery in the other eye might be needed
- Discussion with a refractive specialist clarifies whether monocular treatment is wise