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When people think about laser vision correction, LASIK is usually the first treatment that comes to mind. It’s one of the most well-known and widely performed procedures for reducing dependence on glasses and contact lenses.
However, what many people don’t realise is that not everyone is a suitable candidate for LASIK. While hearing this can initially be disappointing, it doesn’t necessarily mean you’re not a candidate for vision correction. Advances in refractive surgery mean there are now several treatment options available, and for many people, an alternative procedure may actually provide a safer or better long-term outcome.
LASIK works by creating a thin flap in the cornea before reshaping the underlying tissue with an excimer laser. To do this safely, the cornea must meet certain structural requirements.
Some common reasons LASIK may not be recommended include:
Being told you’re not suitable for LASIK doesn’t automatically mean you’ve reached the end of the road. In fact, many patients achieve excellent visual outcomes with other refractive procedures.
The best option depends on your prescription, eye health, age, lifestyle, and visual goals.
PRK is one of the original laser vision correction procedures and remains an excellent option today. Instead of creating a corneal flap, the surface layer of the cornea is gently removed before the laser reshapes the cornea. The surface naturally heals over several days.
PRK may be recommended for people with:
While recovery takes slightly longer than LASIK, the long-term visual outcomes are comparable.
SMILE is another form of laser vision correction that treats short-sightedness and some levels of astigmatism through a very small incision rather than creating a large flap.
Not everyone is a candidate for SMILE, but for the right patient it can be an excellent alternative.
For patients with very high prescriptions or corneas that are not suitable for laser treatment, an Implantable Collamer Lens (ICL) may be recommended.
Rather than reshaping the cornea, a specially designed lens is placed inside the eye, behind the iris and in front of the natural lens. This means the natural lens remains in place, allowing patients to retain their natural ability to focus (accommodation).
ICL may be suitable for patients who:
Because no corneal tissue is removed, ICL offers another pathway to reduced dependence on glasses for many patients who aren’t laser candidates.
For some people, particularly those over 50 or those beginning to develop presbyopia (the need for reading glasses) or early cataracts, replacing the eye’s natural lens may provide the best long-term solution.
During refractive lens exchange, the natural lens is replaced with an artificial intraocular lens selected to suit the patient’s vision goals.
This procedure can:
The most important step isn’t deciding which procedure you want, it’s determining which procedure is safest and most appropriate for your eyes.
A comprehensive refractive assessment includes:
These tests allow your ophthalmologist to recommend the procedure that offers the best balance of safety, visual quality, and long-term stability.
It’s natural to feel disappointed if you’re told you’re not suitable for LASIK. But modern refractive surgery is no longer about finding patients who fit one procedure. Instead, today’s approach is about matching the right treatment to the right patient.
Whether that’s LASIK, PRK, SMILE, an Implantable Collamer Lens (ICL), or refractive lens exchange, there are more options than ever before to reduce dependence on glasses and contact lenses.
If you’re considering vision correction surgery, a comprehensive assessment can determine which treatment is best suited to your prescription, eye health, and lifestyle. With today’s range of refractive procedures, many people who aren’t candidates for LASIK can still enjoy excellent vision and greater freedom from glasses or contact lenses.
There is no single age limit that applies to every procedure. LASIK, PRK and SMILE are generally considered for adults over 18 with a stable prescription. ICL is typically considered for adults aged 21 and over, particularly those with moderate to high prescriptions who may not be suitable for laser vision correction. For older patients, particularly those experiencing presbyopia or developing cataracts, refractive lens exchange may be a more appropriate option. The most suitable procedure depends on your prescription, eye health, age and visual needs.
Not everyone with a high glasses prescription is suitable for LASIK, as there are limits to how much corneal tissue can safely be removed. However, this does not necessarily rule out refractive surgery. Depending on your prescription and eye health, alternatives such as Implantable Collamer Lenses (ICL) may be considered.01
Dry eye is an important consideration when assessing suitability for LASIK. The procedure can temporarily worsen dry eye symptoms, so patients with existing dry eye may require treatment before surgery. Depending on the severity of symptoms and tear film health, an alternative refractive procedure may be more appropriate.
Most patients achieve approximately 90% of their visual recovery within 2–3 days following LASIK, with vision typically reaching 100% by around one week. However, recovery times can vary between individuals, and some patients may experience mild fluctuations in their vision during the healing process. Regular post-operative reviews allow your ophthalmologist to monitor your recovery and ensure your eyes are healing as expected.
Yes. Playing contact sports does not automatically exclude you from having LASIK. However, your lifestyle and the risk of eye injury are important considerations when choosing a refractive procedure. Your ophthalmologist may discuss alternative options, such as PRK, depending on your sporting activities and individual eye health.
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