If you would like to say goodbye to wearing glasses and contact lenses by investing in laser vision correction, you are not alone!  Laser vision correction is a lifestyle changing investment that has helped millions of people around the world enjoy clear, glasses-free vision.

As the technology advances, more and more people are suitable for one of the options available including LASIK, SMILE or PRK, however there remains a number of boxes that must be ticked before you are able to book in.

One of these is having a stable prescription.

This might sound like a technical detail, but it’s actually one of the most important factors in deciding whether the time is right for you to invest in laser vision correction.

So you can understand why, let’s explore why stability matters and what it means for your long-term results.

What does a stable prescription mean?

When we say your prescription needs to be stable, we mean that your glasses or contact lens prescription hasn’t changed significantly over a certain period of time which for most eye surgeons will be between 12-18 months. This indicates that your vision has settled and isn’t continuing to get stronger, weaker, or more astigmatic. Laser  vision correction works best when your eyes are  finished experiencing those constant shifts.

Simply put, a stable prescription ensures that your eyes have stopped changing, allowing for a more predictable and long-lasting outcome when investing in laser vision correction.

Why does stability matters for success?

Laser vision correction works by reshaping the cornea (the clear front part of your eye) so that light focuses properly on the retina. This correction is based on your most recent prescription.

If your prescription is still changing there’s a higher risk that your vision will continue to change post-surgery, potentially impacting the benefits of the laser procedure. A stable prescription on the other hand indicates that your eyes have reached a point where further changes are unlikely. This is important to ensure the best possible results and reduce the likelihood of needing enhancements in the future.

Think of it like tailoring a suit or dress while you’re still growing. It might fit perfectly today, but if your body changes, that perfect fit won’t last. Similarly, if your prescription changes after surgery, you could find yourself back in glasses or contacts sooner than you’d like.

Stable prescriptions help ensure your results are long-lasting and that you get the most out of your investment.

How long does my prescription need to be stable?

Most eye surgeons will want to see at least 12 months of stability, but sometimes two years is preferred, especially for younger patients. This is because vision tends to fluctuate more during teenage years and early adulthood, and it usually stabilises in your mid-20s.

Why do prescriptions change over time?

Several factors can cause shifts in your vision prescription, including:

• Age and Eye Growth: Younger patients, particularly those in their late teens and early twenties, often experience ongoing changes in their vision as their eyes continue to develop. For this reason many ophthalmologists recommend that you be over 21 years of age and have a stable prescription for at least 24 months before considering Laser Vision Correction.
• Lifestyle Factors: Excessive screen time, prolonged near work, and insufficient outdoor activity have been linked to worsening myopia, especially among young adults.
• Hormonal Changes: Pregnancy, menopause, and other hormonal shifts can temporarily alter vision, making stability difficult to determine.
• Medical Conditions: Conditions like diabetes or autoimmune diseases along with some medications can affect eye health and cause fluctuations in vision. If your prescription continues to change, it may indicate that your eyes are still adapting, making Laser Vision Correction less predictable.

Reason to wait

If you go ahead with surgery while your prescription is still changing, you run the risk of:

• Regression: Your eyes may drift back toward your old prescription.
• Needing “top-up” surgery: Some patients require enhancements later if their vision changes.
• Ongoing glasses or contacts: You might still need correction, which defeats the purpose of surgery.

None of these outcomes are dangerous, but they can be disappointing. By ensuring stability before your procedure, you improve your chances of achieving clear and long lasting vision with minimal risk of any of the above.

What If My Prescription Keeps Changing?

Don’t worry if your prescription hasn’t settled yet. This is not uncommon and some people’s vision takes longer to stabilise. In the meantime, glasses and contact lenses can still give you great clarity and once your prescription stops shifting, you can revisit investing in laser vision correction.

Your eye doctor may recommend annual eye exams to track changes. Sometimes, underlying conditions like keratoconus (a thinning cornea) or uncontrolled diabetes can cause unstable vision, so it’s important to rule out those issues too.

When Is the right time to have Laser Vision Correction?

The best time for laser vision correction is when your optometrist confirms that your prescription has remained unchanged for one to two years. This ensures a more predictable outcome, allows an ophthalmologist to best advise what laser technology is the best option for your unique eyes, and reduces the likelihood of needing future enhancements.

Next steps

Laser vision correction is an amazing investment for your lifestyle but timing is important. A stable prescription is the foundation for a successful, long-lasting outcome.

If you’re considering this procedure, confirm with your optometrist that your prescription has been stable and book a consultation with an experienced refractive and laser vision correction eye surgeon. They’ll check your prescription history, measure your eyes thoroughly, and let you know what your best options are.

Book an obligation free assessment

Hunter Street Eye Specialists specialises in laser vision correction with Dr Peter Sumich, a highly experienced and skilled refractive and laser surgeon available for consulting access to a comprehensive suite of refractive technology and diagnostic equipment for its patient community.

No referral is needed to book in for an assessment to understand your suitability. Please do not hesitate to contact a member of our friendly team on 02 9635 0663 or by filling out the contact form here.  

Quick FAQs

How do I know if my prescription is stable?
Your optometrist can tell you by comparing your prescription records over time. If there’s been little or no change in the past year, that’s a good sign.

What if my eyes change after surgery anyway?
It can happen, but it’s less likely if your prescription was stable beforehand. In some cases, a follow-up procedure (called an enhancement) can fine-tune your vision if needed.

Does age matter for stability?
Yes. Prescriptions are more likely to stabilise by your mid-20s. Younger patients are at higher risk of ongoing changes, which is why most clinics recommend waiting until at least 21.

Can I still wear glasses or contacts while waiting?
Absolutely. These will keep your vision sharp and comfortable until your eyes settle and you’re ready for surgery.