Can I have laser eye surgery if I have a squint or lazy eye?

A squint (strabismus) or a lazy eye (amblyopia) does not automatically rule out laser eye surgery, but it does change the assessment and the expected outcome. Laser surgery reshapes the cornea to correct short-sight, long-sight and astigmatism. It does not straighten a turned eye, retrain the brain, or cure amblyopia. Understanding this distinction is the key to deciding whether laser surgery is worth it for you.

What is a squint?

A squint means the eyes are not aligned properly. One eye may turn in, out, up or down, either all the time or only when tired. Some squints are corrected with glasses, some need prism lenses, and others need eye muscle surgery. Many adults with a childhood squint have good vision in each eye but reduced depth perception or occasional double vision.

What is a lazy eye?

A lazy eye, or amblyopia, is a developmental condition where the brain does not fully process the image from one eye, even when the eye itself is healthy. It usually starts in childhood. Once the visual system is fully developed, typically by around the age of seven to nine, amblyopia cannot be reversed by glasses, exercises or laser surgery. Laser can only make the image clearer; it cannot make the brain pay more attention to it.

Can laser surgery fix a squint?

No. Laser surgery changes the focusing power of the cornea. It does not move the eyes or change the muscles that control alignment. If you have a squint, you can still have laser eye surgery, but it will only reduce your dependence on glasses or contact lenses. The eye turn itself will still be present, and any associated double vision or reduced depth perception will not be corrected by the laser.

In some cases, treating a squint first — with glasses, prism, botulinum toxin or eye muscle surgery — makes laser surgery more straightforward later. Your ophthalmologist and orthoptist can advise on the right sequence.

Can laser surgery fix a lazy eye?

Laser surgery can improve the focusing of a lazy eye, but it cannot cure amblyopia. If your lazy eye sees 20/40 with glasses, laser might give you 20/40 without glasses. It will not give you 20/20 vision in that eye if the brain has never learned to use it fully.

This is an important point for anyone hoping laser surgery will 'balance' the eyes after a lifetime of poor vision in one eye. The realistic goal is convenience — less dependence on glasses or contact lenses — rather than perfect vision.

What we check before recommending laser surgery

A thorough assessment for anyone with a squint or lazy eye includes a full orthoptic examination. We measure how well each eye sees on its own, how the eyes work together, whether there is double vision, and whether the squint is stable. We also check the corneal shape, prescription stability, tear film and overall eye health.

Will laser surgery make double vision worse?

For most people, laser surgery does not change double vision. However, if your brain is currently suppressing the image from one eye, changing the prescription can occasionally alter how the two eyes interact. This is why a detailed binocular vision assessment is important before proceeding.

Alternatives to consider

If laser surgery is not suitable or is unlikely to meet your expectations, other options include contact lenses, implantable collamer lenses (ICLs), and in some cases refractive lens exchange. For children and young adults with amblyopia, patching or vision therapy may be recommended under the care of a paediatric ophthalmologist, though these are not effective in adults.

Realistic expectations are essential

The most important question is not whether you can have laser surgery, but whether it will give you the result you want. If your goal is to reduce dependence on glasses or contact lenses and your prescription is stable, laser surgery may be a good option. If your goal is to straighten the eyes, cure a lazy eye, or restore depth perception, laser surgery is not the right tool.

Next steps

If you have a squint or lazy eye and are considering laser eye surgery, book a comprehensive refractive and orthoptic assessment. We will measure your vision, check how your eyes work together, and give you an honest opinion on whether laser surgery is likely to help you.