---
title: What is Kahook Dual Blade?
description: "The Kahook Dual Blade KDB is a specialised instrument used in minimally invasive glaucoma surgery to remove a strip of the trabecular meshwork and enhance fluid outflow. ## How KDB surgery works Through a small corneal incision, the surgeon uses…"
url: "https://bluefinvision.com/knowledge-base/topics/treatments-procedures/what-is-kahook-dual-blade/"
updated: "2025-12-31"
category: "Treatments & Procedures"
---

# What is Kahook Dual Blade?

The Kahook Dual Blade KDB is a specialised instrument used in minimally invasive glaucoma surgery to remove a strip of the trabecular meshwork and enhance fluid outflow.

## How KDB surgery works

Through a small corneal incision, the surgeon uses the blade to excise a segment of the trabecular meshwork under gonioscopic view. This opens a direct pathway from the anterior chamber into Schlemm's canal.

- Often combined with cataract surgery in open-angle glaucoma
- Does not leave an implanted device inside the eye
- Procedure is typically quick with a small incision
- Designed for mild to moderate disease needing better pressure control

## Recovery and expectations

Patients may experience temporary bleeding or blurred vision that usually settles. Pressure reduction is moderate.

- Some people can reduce the number of glaucoma drops
- Regular monitoring is still required to track long-term control
- Less suitable where very low target pressures are required
- Appropriate mainly for open, not closed, drainage angles