---
title: Does selective laser trabeculoplasty (SLT) hurt?
description: "SLT may cause brief mild discomfort but is usually not described as painful. Numbing drops are used before the laser begins. ## Sensations during SLT A contact lens is placed on the eye to focus the laser. You may see…"
url: "https://bluefinvision.com/knowledge-base/topics/treatments-procedures/does-selective-laser-trabeculoplasty-slt-hurt/"
updated: "2025-12-16"
category: "Treatments & Procedures"
---

# Does selective laser trabeculoplasty (SLT) hurt?

SLT may cause brief mild discomfort but is usually not described as painful. Numbing drops are used before the laser begins.

## Sensations during SLT

A contact lens is placed on the eye to focus the laser. You may see bright flashes and hear soft clicks.

- Some people feel a light pricking or tapping sensation
- Pain is typically rated very low and short-lived
- The procedure usually takes just a few minutes per eye
- Anxiety often reduces once the first few pulses are experienced

## After SLT

Mild eye ache, redness, or headache can occur but normally passes quickly. Strong pain is unusual.

- Anti-inflammatory drops may be given for a few days
- Over-the-counter painkillers usually manage any soreness
- Contact your clinic if pain is severe or vision drops suddenly
- Pressure checks after treatment ensure the eye is responding safely