YAG laser peripheral iridotomy creates a tiny opening in the coloured part of the eye to improve fluid flow. It is commonly used to treat or prevent angle-closure glaucoma.
Why the procedure is done
In narrow or closed angles, fluid cannot drain properly, leading to sudden or chronic pressure rises. The small hole forms a bypass route.
- Relieves pupil block where the iris bows forward against the lens
- Helps open the drainage angle in eyes at risk of acute attacks
- Often recommended for the second eye as a precaution
- May be combined with other treatments such as lens surgery
What to expect and possible effects
The laser is usually done in clinic with numbing drops. Most people tolerate it well.
- Temporary light sensitivity, redness, or ache are common afterwards
- Pressure is checked shortly after the procedure and at follow-up
- Some patients notice small ghost images or glare that often fade
- Drops may continue long term if pressure remains high despite the iridotomy
