What prescription is too high for LASIK?
There is no single cut-off figure, because the limiting factor is usually how much corneal tissue the correction would require rather than the prescription number on its own.
- Subject
- Vision correction
- Topic
- LASIK
- Kind of question
- Other questions
- Procedures
- LASIK
- Last reviewed
- 22 September 2026
In more detail
A high prescription in a thick cornea may be treatable while a moderate one in a thin cornea may not. That is why a clinic that quotes a maximum number without measuring your cornea is answering a different question from the one you asked.
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Where this answer sits
It is one of 483 answers in the vision and eye health knowledge base, filed under Vision correction & laser eye surgery in LASIK . The subject page carries the answers either side of it, and the hub is searchable.
Subjects this question touches
The pages that answer the subject behind the question, rather than the question itself.
- Procedure LASIK
- Procedure Femto LASIK
- Comparison LASIK vs SMILE
- Comparison LASIK vs PRK
- Place LASIK in Dubai
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