Description
Label a supplied angle kappa with its declared positive-direction convention.
Eye records preserve laterality, reference axes, chart distance, calibration provenance and geometric scale. Disc-diameter units are a relative image scale, not a physical length, and cylinder sign differs from a full prescription transformation. Supplied labels and conversions do not inspect an eye, detect disease or choose care.
Label a supplied angle kappa with its declared positive-direction convention.
When to use this tool
Use Ocular Angle Kappa Sign Label when you already have angleDegrees, positiveConvention and need to label a supplied angle kappa with its declared positive-direction convention.
How to use the tool and how it works
- Enter angleDegrees, positiveConvention. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read label. Use the output convention below.
Require positiveConvention nonempty; append degree symbol and the convention to the signed angle.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| angleDegrees | Angle Degrees | Required. Finite number. |
| positiveConvention | Positive Convention | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| label | Label | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"angleDegrees": 3,
"positiveConvention": "nasal reference A"
},
"output": {
"label": "3° [positive=nasal reference A]"
}
}Limitations and assumptions
- No ocular landmarks, angle measurement, normal range or clinical significance is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review the original image calibration, refraction convention and chart-distance record for substantive measurements. Use complete optical or image geometry when physical scale or clinical interpretation is required; relative disc units and axis labels preserve narrower conventions.
References
Similar or alternative tools
- Ophthalmic Meridian Orthogonal Pair
Return an axis and its orthogonal meridian under a half-turn convention.
- Frame Optical Center Decentration
Reorient an optical-center offset to a temporal-positive convention.