diff --git a/CHANGELOG-PRERELEASE.md b/CHANGELOG-PRERELEASE.md
index 226025e10..41000c53d 100644
--- a/CHANGELOG-PRERELEASE.md
+++ b/CHANGELOG-PRERELEASE.md
@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog].
 ### Removed
 
 ### Fixed
+- Left eye disappears `#493`
 
 ### Security
 
diff --git a/Editor/Processors/TraceAndOptimize/AnimatorParser.cs b/Editor/Processors/TraceAndOptimize/AnimatorParser.cs
index f5405da62..affc88b75 100644
--- a/Editor/Processors/TraceAndOptimize/AnimatorParser.cs
+++ b/Editor/Processors/TraceAndOptimize/AnimatorParser.cs
@@ -327,7 +327,7 @@ void MergeLayer(VRCAvatarDescriptor.AnimLayerType type, bool alwaysApplied, floa
                 var rightEye = descriptor.customEyeLookSettings.rightEye;
                 if (leftEye)
                 {
-                    var updater = modificationsContainer.ModifyObject(rightEye);
+                    var updater = modificationsContainer.ModifyObject(leftEye);
                     foreach (var prop in TransformRotationAnimationKeys)
                         updater.AddModificationAsNewLayer(prop, AnimationProperty.Variable());
                 }