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prism_stacking [2025/03/01 03:16] – Scott Larsonprism_stacking [2025/06/07 02:49] (current) – [Table] Scott Larson
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-====== Value of Two Prisms Stacked in the Same Direction (Prism Diopters) ======+====== Value of Two Stacked Prisms ====== 
 +**The prisms are pointing in the same direction **
 ===== Calculator ===== ===== Calculator =====
- +[[https://eyefixer.org/value-of-two-stacked-prisms/|Click Here]]
-<html> +
-<head> +
-    <title>Stacked Prism Value Lookup</title> +
-    <style> +
-        body { +
-            font-family: Arial, sans-serif; +
-            margin: 20px; +
-            padding: 20px; +
-            max-width: 600px; +
-        } +
-        h2 { +
-            color: #333; +
-        } +
-        label { +
-            font-weight: bold; +
-        } +
-        input, button { +
-            margin-top: 5px; +
-            padding: 8px; +
-            font-size: 16px; +
-        } +
-        p { +
-            font-size: 18px; +
-            font-weight: bold; +
-            color: blue; +
-            margin-top: 10px; +
-        } +
-    </style> +
-    <script> +
-        const prismTable = { +
-            10: {10: 21, 20: 33, 30: 46, 40: 60, 50: 77}, +
-            20: {10: 33, 20: 47, 30: 66, 40: 89, 50: 122}, +
-            30: {10: 46, 20: 66, 30: 94, 40: 141, 50: 256}, +
-            40: {10: 60, 20: 89, 30: 141,40: 339}, +
-            50: {10: 77, 20: 122, 30: 256}, +
-        }; +
- +
-        function lookupValue() { +
-            let prism1 = document.querySelector('input[name="prism1"]:checked').value; +
-            let prism2 = document.querySelector('input[name="prism2"]:checked').value; +
-             +
-            prism1 = parseInt(prism1); +
-            prism2 = parseInt(prism2); +
-             +
-            if (prismTable[prism2] && prismTable[prism2][prism1] !== undefined) { +
-                document.getElementById("result").innerHTML = `Result: <strong>${prismTable[prism2][prism1]} Prism Diopters</strong>`; +
-            } else { +
-                document.getElementById("result").innerText = "Invalid input"; +
-            } +
-        } +
-    </script> +
-</head> +
-<body> +
-    <h2>Prism Value of Two Prisms Stacked in the Same Direction</h2> +
-    <label for="prism1">Select Prism 1 (PD): </label> +
-    <br> +
-    <input type="radio" name="prism1" value="10"> 10 +
-    <input type="radio" name="prism1" value="20"> 20 +
-    <input type="radio" name="prism1" value="30"> 30 +
-    <input type="radio" name="prism1" value="40"> 40 +
-    <input type="radio" name="prism1" value="50"> 50 +
-    <br><br> +
-    <label>Select Prism 2 (PD):</label> +
-    <br> +
-    <input type="radio" name="prism2" value="10"> 10 +
-    <input type="radio" name="prism2" value="20"> 20 +
-    <input type="radio" name="prism2" value="30"> 30 +
-    <input type="radio" name="prism2" value="40"> 40 +
-    <input type="radio" name="prism2" value="50"> 50 +
-    <br><br> +
-    <button onclick="lookupValue()">Lookup</button> +
-    <br> +
-    <br> +
-    <p id="result"></p> +
-</body> +
-</html> +
-<button type="primary" size="sm">[[prism_stacking|Reset Calculator]]</button> +
 ==== Table ==== ==== Table ====
- 
  
 |                |  **1st Prism**                                          ||||| |                |  **1st Prism**                                          |||||
Line 91: Line 13:
 | **50Δ**        | 77              | 122      | 256      |          |          | | **50Δ**        | 77              | 122      | 256      |          |          |
  
-{{tag>strabismus}}+Adapted From: [[https://1drv.ms/b/c/31d83ae8e55e0542/ES49Ej_-iyJHmmIL8jmZFEgBpwde_sp-n8pyxpMYBiZUOQ?e=uJIX5C |Thompson & Guyton. Ophthalmic Prisms: Measurement Errors and How to Minimize Them. Ophthalmology 1983;90:204-2010]] 
 + 
 +{{tag>strabismus prism calculator}}