How stable does my prescription need to be before surgery?
Clinics generally look for a prescription that has been stable for a period rather than for a specific number, because operating on a moving prescription risks treating an eye that will not match the plan a year later.
- Subject
- Surgery journey
- Topic
- Eligibility & assessment
- Kind of question
- Other questions
- Last reviewed
- 22 September 2026
In more detail
How that stability is demonstrated varies: some clinics rely on your history of prescriptions, others ask you to be rechecked after an interval. If your prescription changed at your last two tests, say so at the consultation.
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Where this answer sits
It is one of 483 answers in the vision and eye health knowledge base, filed under The surgery journey in Eligibility & assessment . The subject page carries the answers either side of it, and the hub is searchable.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
General answers cannot tell you what is happening in your own eyes. Only an examination by a qualified ophthalmologist can do that.
Sources & further reading
We prefer primary sources. Where a claim comes from a manufacturer, a single study or a regulator, it is labelled as such below.
- The Royal College of Ophthalmologists
The UK professional body for ophthalmologists, which publishes standards and commissioning guidance for refractive surgery services.
Used for What good preoperative assessment and consent look like.
Link checked 22 September 2026