Randleman Ectasia Risk Score System
Randleman Ectasia Risk Score System (Randleman 2008): topography + residual stromal bed + age + corneal thickness + MRSE myopia magnitude; 0-2 low, 3 moderate, >= 4 high risk of post-LASIK ectasia.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Topography grade
- 3
- Residual stromal bed
- 250 um
- Age
- 20 years
- Central corneal thickness
- 445 um
- Manifest refraction spherical equivalent
- -15 D
Result: Randleman ERSS 18 — high ectasia risk (>= 4).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-2
- Low ectasia risk.
- 3
- Moderate ectasia risk.
- >= 4
- High risk of post-LASIK ectasia (topography + RSB + age + corneal thickness + MRSE, each 0-4). A risk score, not a diagnosis.
What you enter
- Topography grade (0-4)
- Residual stromal bed
- Age
- Central corneal thickness
- Manifest refraction spherical equivalent
How this is calculated
Randleman JB, Woodward M, Lynn MJ, Stulting RD. Risk assessment for ectasia after corneal refractive surgery. Ophthalmology. 2008;115(1):37-50. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.