Optic Nerve Diameter Calculator

This is an old revision of the document!

- use to estimate optic nerve size with the Heidelberg Spectralis OCT optic nerve scan report.

<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calculate Optic Nerve Diameter</title>

</head> <body>

<h3>Calculate optic nerve diameter Using Heidelberg Spectralis OCT optic nerve report</h3>

<label for="a">Measure green ring diameter from OCT report and enter here (mm):</label>
<input type="number" id="a" step="any" placeholder="Ring Diameter"><br><br>

<label for="b">Measure optic nerve diameter from OCT report and enter here (mm):</label>
<input type="number" id="b" step="any" placeholder="Optic Nerve Diameter"><br><br>

<button onclick="calculateC()">Calculate</button>
<br><br>
<p id="result"></p>

<script>
  function calculateC() {
    // Get input values
    const a = parseFloat(document.getElementById("a").value);
    const b = parseFloat(document.getElementById("b").value);

    // Check if inputs are valid numbers
    if (isNaN(a) || isNaN(b) || a === 0) {
      document.getElementById("result").textContent = "Please enter valid numbers. They must not be zero.";
      return;
    }

    // Calculate C using the formula
    const c = (b / a) * 3.5;

    // Display the result in bold
    document.getElementById("result").innerHTML = `The optic nerve diameter is: <strong>${c.toFixed(2)}</strong>`;
  }
</script>

</body> </html>

calculator