LASIK Ablation Depth
Estimate LASIK ablation depth and residual stromal bed using caller-supplied coefficients.
Description
A LASIK arithmetic estimate subtracts modeled ablation and flap thickness from total corneal thickness.
A LASIK arithmetic estimate subtracts modeled ablation and flap thickness from total corneal thickness. Ablation uses a caller-supplied linear coefficient.1
Estimate LASIK ablation depth and residual stromal bed using caller-supplied coefficients.
When to use LASIK Ablation Depth
Use this tool to estimate LASIK ablation depth and residual stromal bed using caller-supplied coefficients.
Prepare the optical measurements, geometry, fitted coefficients or caller-selected thresholds requested. Confirm wavelength, radius/diameter, pulse-width, angle and unit conventions before running the calculation.
How to use LASIK Ablation Depth and understand its results
- Prepare the optical measurements, geometry, fitted coefficients or caller-selected thresholds requested. Confirm wavelength, radius/diameter, pulse-width, angle and unit conventions before running the calculation.
- Enter correctionDiopters, micrometersPerDiopter, cornealThicknessMicrometers, flapThicknessMicrometers, minimumResidualBedMicrometers using the field table and calculation rules, then run the tool.
- Read ablationDepthMicrometers, residualBedMicrometers, meetsResidualBedMinimum. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| correctionDiopters | Requested refractive correction (D) | number; minimum: 0 | Required |
| micrometersPerDiopter | Ablation coefficient (µm/D) | number; minimum: 0 | Required |
| cornealThicknessMicrometers | Corneal thickness (µm) | number; minimum: 0 | Required |
| flapThicknessMicrometers | Flap thickness (µm) | number; minimum: 0 | Required |
| minimumResidualBedMicrometers | Caller minimum residual bed (µm) | number; minimum: 0 | Required |
Enter nonnegative correction, coefficient and thicknesses/minimum. Return ablation, signed residual and inclusive minimum gate.
ablation=diopters×µmPerDiopter; residual=cornea−flap−ablation Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| ablationDepthMicrometers | Estimated ablation depth (µm) | number; minimum: 0 |
| residualBedMicrometers | Estimated residual stromal bed (µm) | number |
| meetsResidualBedMinimum | Meets supplied residual-bed minimum | boolean |
{
"input": {
"correctionDiopters": 5,
"micrometersPerDiopter": 10,
"cornealThicknessMicrometers": 500,
"flapThicknessMicrometers": 100,
"minimumResidualBedMicrometers": 300
},
"output": {
"ablationDepthMicrometers": 50,
"residualBedMicrometers": 350,
"meetsResidualBedMinimum": true
}
}Limitations and assumptions
No optical-zone model, tomography, patient eligibility, treatment plan or clinical safety threshold is supplied.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use SLT Dose Window Check: Calculate SLT pulse fluence and compare it with caller-supplied dose bounds. For a complementary task, use PDT Light Dose: Calculate PDT light dose and check a caller-supplied drug-to-light interval.
References
-
LASIK Ablation Depth — tool.io
Similar or alternative tools
- SLT Dose Window Check
Calculate SLT pulse fluence and compare it with caller-supplied dose bounds.
- PDT Light Dose
Calculate PDT light dose and check a caller-supplied drug-to-light interval.