Skip to content

Main content

Contact Lens Parameter Unit Label

Record supplied contact-lens parameter and unit wording without choosing a lens parameter.

Loading tool…

Description

Record supplied contact-lens parameter and unit wording.

Optical records distinguish sphere/cylinder powers, principal meridian axes, prism-base labels and eye-specific offset signs. A radial lens-blank margin is half its diametral margin under centered circular geometry. Local optical formulas and code labels do not perform refraction, verify fit or prescribe a lens.

Record supplied contact-lens parameter and unit wording.

When to use this tool

Use Contact Lens Parameter Unit Label when you already have recordId, parameterWording, unitText and need to record supplied contact-lens parameter and unit wording.

How to use the tool and how it works

  1. Enter recordId, parameterWording, unitText. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read token. Use the output convention below.

Enter recordId, parameterWording, unitText using the field constraints below. Encode these values, in exactly that order, as a JSON array and return the serialized array as text in token. String values are preserved without trimming or external terminology lookup.1

Input fieldMeaning and unitsAccepted input
recordIdRecord IdRequired. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192.
parameterWordingParameter WordingRequired. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192.
unitTextUnit TextRequired. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192.
Output fieldInterpretationReturned shape
tokenTokenRequired. Text; maximum UTF-16 length 8192.
json
{
  "input": {
    "recordId": "CL17",
    "parameterWording": "base curve",
    "unitText": "mm"
  },
  "output": {
    "token": "[\"CL17\",\"base curve\",\"mm\"]"
  }
}

Limitations and assumptions

  • The result records supplied values without choosing a lens parameter. Sources and asserted relationships are not independently authenticated.
  • 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.

Alternative or Complementary methods

Use the complete verified optical prescription and lens/frame geometry for a design or fit analysis. Preserve sphere-cylinder axis and eye-specific direction conventions; a meridian sum or centered circular clearance is only one part of that calculation.

References

  1. Calculation and input contract: optometry/contact-lens-parameter-unit-label — tool.io

Similar or alternative tools