What is corneal tomography?
Corneal tomography measures the shape of the cornea in three dimensions, including the thickness profile across it, rather than describing the front surface alone.
- Subject
- Surgery journey
- Topic
- Eye tests & scans
- Kind of question
- What is…
- Last reviewed
- 22 September 2026
In more detail
The distinction matters because some corneal conditions are visible mainly in how the thickness changes from the centre outwards. Tomography shows that relationship; topography on its own does not.
Related guides
People also ask
The questions readers move to next from this one: the closest subjects first, from either question bank.
Where this answer sits
It is one of 483 answers in the vision and eye health knowledge base, filed under The surgery journey in Eye tests & scans . 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.
- Place Eye tests 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