Eye Openness Percentage Calculator
Actual individually calibrated eyelid aperture normalized0–100openness, clamped; not uncalibratedretinaltracking or fatigue/identity inference.
Description
Eye openness can be normalized between measured closed and open eyelid baselines.
Eye openness can be normalized between measured closed and open eyelid baselines.1
Individual calibration determines how an aperture measurement maps to a percentage. The calculation and input requirements are explained below.
When to use Eye Openness Percentage Calculator
Enter nonnegative measured aperture and closed baseline in mm, plus a positive open baseline strictly greater than the closed baseline.
How to use Eye Openness Percentage Calculator and how it works
- Prepare the measurements or independently established model inputs described below, with matching units and observation scope.
- Enter the required fields and run Eye Openness Percentage Calculator.
- Read the result fields using the formula, output units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualMeasuredLidApertureMm | Actual Measured Lid Aperture Mm. Use the units and matching context stated in the calculation below. | number | Required; nonnegative; finite; other constraints below |
| callerMeasuredClosedBaselineMm | Caller Measured Closed Baseline Mm. Use the units and matching context stated in the calculation below. | number | Required; nonnegative; finite; other constraints below |
| callerMeasuredOpenBaselineMm | Caller Measured Open Baseline Mm. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Enter nonnegative measured aperture and closed baseline in mm, plus a positive open baseline strictly greater than the closed baseline. Normalize aperture between those baselines, clamp to 0–1 and multiply by 100. Measurements outside the baseline span return 0% or 100%.
opennessPercent=100*clamp((aperture-closed)/(open-closed),0,1) Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Numeric result under the formula and output units explained above. | number |
{
"input": {
"actualMeasuredLidApertureMm": 2,
"callerMeasuredClosedBaselineMm": 1,
"callerMeasuredOpenBaselineMm": 3
},
"output": {
"result": {
"value": 50
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Pupil Diameter VR Calculator for a complementary operation: Pupil diameter varies with illumination and observation conditions.
Use Iris Illumination VR Calculator for a complementary operation: Iris illumination depends on spectral output, optical geometry and the measurement plane.
References
-
Eye Openness Percentage Calculator — tool.io
Similar or alternative tools
- Pupil Diameter VR Calculator
Pupil diameter varies with illumination and observation conditions.
- Iris Illumination VR Calculator
Iris illumination depends on spectral output, optical geometry and the measurement plane.