diff --git a/src/result.ts b/src/result.ts
index ea4a88d8..833d683a 100644
--- a/src/result.ts
+++ b/src/result.ts
@@ -20,7 +20,8 @@ import { Tensor } from '../dist/tfjs.esm.js';
  * - genderConfidence: gender detection confidence as value
  * - emotion: emotions as array of possible emotions with their individual scores
  * - embedding: facial descriptor as array of numerical elements
- * - iris: iris distance from current viewpoint as distance value
+ * - iris: iris distance from current viewpoint as distance value in centimeters for a typical camera
+ *   field of view of 88 degrees. value should be adjusted manually as needed
  * - rotation: face rotiation that contains both angles and matrix used for 3d transformations
  *  - angle: face angle as object with values for roll, yaw and pitch angles
  *  - matrix: 3d transofrmation matrix as array of numeric values