Accommodation Distance Calculator
Positive branch virtual focus accommodation distance meters reciprocal independently measuredopticaldiopters, zero/infinite branch rejected. Not clinical accommodativeprediction.
Description
Accommodation distance is the reciprocal of optical power on the positive-focus branch.
Accommodation distance is the reciprocal of optical power on the positive-focus branch.1
A finite distance requires a positive power in diopters. The calculation and input requirements are explained below.
When to use Accommodation Distance Calculator
Enter positive optically measured accommodation power in diopters.
How to use Accommodation Distance 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 Accommodation Distance 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 |
|---|---|---|---|
| actualOpticallyMeasuredAccommodationDiopters | Actual Optically Measured Accommodation Diopters. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Enter positive optically measured accommodation power in diopters. Return its reciprocal in meters. Zero or negative power is rejected rather than assigned an infinite or negative focus distance.
distanceM=1/accommodationDiopters 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": {
"actualOpticallyMeasuredAccommodationDiopters": 0.5
},
"output": {
"result": {
"value": 2
}
}
}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 Vergence Distance Calculator for a complementary operation: Vergence is the inward rotation of the eyes toward a common target.
Use Vergence Accommodation Conflict Calculator for a complementary operation: Vergence and accommodation describe eye alignment and optical focus respectively.
References
-
Accommodation Distance Calculator — tool.io
Similar or alternative tools
- Vergence Distance Calculator
Vergence is the inward rotation of the eyes toward a common target.
- Vergence Accommodation Conflict Calculator
Vergence and accommodation describe eye alignment and optical focus respectively.