---
title: What is iStent glaucoma implant?
description: "The iStent is a tiny glaucoma implant placed inside the eye's drainage angle to help lower pressure. ## How the iStent works In open-angle glaucoma, the natural drainage mesh can become resistant to fluid outflow. The iStent creates a small…"
url: "https://bluefinvision.com/knowledge-base/topics/treatments-procedures/what-is-istent-glaucoma-implant/"
updated: "2025-12-31"
category: "Treatments & Procedures"
---

# What is iStent glaucoma implant?

The iStent is a tiny glaucoma implant placed inside the eye's drainage angle to help lower pressure.

## How the iStent works

In open-angle glaucoma, the natural drainage mesh can become resistant to fluid outflow. The iStent creates a small channel from the front chamber into Schlemm's canal, improving drainage.

- Implanted through a very small incision, often during cataract surgery
- Designed for mild to moderate open-angle glaucoma
- Usually not visible to others once in place
- May reduce the need for some pressure-lowering drops

## Benefits and limitations

The iStent offers a relatively gentle option compared with traditional surgery. However, it may not lower pressure enough in advanced disease.

- Recovery is typically similar to standard cataract surgery
- Patients still need regular glaucoma monitoring
- Some may continue drops or need additional procedures later
- Suitability depends on glaucoma type, target pressure, and eye anatomy