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Question of the month - How do I know if my prescription is within the treatable range?

Published on 25th January 2017 by Dr Stephen Doyle

This month we’ve had enquiries as to whether a patient is suitable for laser eye surgery based on their prescription.

 Our surgeon, Dr Stephen Doyle, explains how this is determined:

“At Visualase, we can treat up to -10.00D for short-sightedness and up to +6.00D for long-sightedness. However, laser eye correction cannot treat every prescription as it does have limits to the amount of tissue that can be removed from the cornea.

It should also be borne in mind that you must be at least 18 years old to have the treatment. This is because eyes tend to keep changing through teenage years into early adulthood, and we need a stable prescription in order to perform the surgery, so some people may have to wait a while longer before proceeding.”

You will also need a consultation with one of our qualified surgeons. This is a FREE service to determine if you are eligible for surgery, and will outline the best treatment for your eyes based on your prescription.

If you contact us with the details from your last eye test, one of our advisors will be able to confirm this for you. However, if your prescription is outside the treatable range then there may still be alternatives available, so please do still call.

Alternatively, for a *quick answer you can take our online survey to find out if you could be suitable for laser eye surgery here.

* You will still need a consultation with one of our surgeons to confirm your suitability.


All eye surgical procedures carry a level of risk including not obtaining the desired outcome, through to varying levels of visual loss. Your eye surgeon will discuss the risks and benefits, including ones specific to your circumstances, at the time of your pre-operative consultation.