diff --git a/src/eye.cpp b/src/eye.cpp
index 75514fd..c61c02e 100644
--- a/src/eye.cpp
+++ b/src/eye.cpp
@@ -108,6 +108,6 @@ glm::vec2 eyeDirection(cv::Mat roi) {
 
 	// convert result to vector for graphics
 	return glm::vec2(
-			(irisPosition.x - roi.rows / 2.0) / (roi.rows / 2.0),
-			(irisPosition.y - roi.rows / 2.0) / (roi.rows / 2.0));
+			(irisPosition.x - eyeMat.rows / 2.0) / (eyeMat.rows / 2.0),
+			(irisPosition.y - eyeMat.rows / 2.0) / (eyeMat.rows / 2.0));
 }