diff --git a/src/engine/Events.ts b/src/engine/Events.ts
index d6fa1cf57..38b6e6003 100644
--- a/src/engine/Events.ts
+++ b/src/engine/Events.ts
@@ -545,7 +545,7 @@ export class DeactivateEvent extends GameEvent<Scene> {
 }
 
 /**
- * Event thrown on an [[Actor]] when it completely leaves the screen.
+ * Event thrown on an [[Actor]] when the graphics bounds completely leaves the screen.
  */
 export class ExitViewPortEvent extends GameEvent<Entity> {
   constructor(public target: Entity) {
@@ -554,7 +554,7 @@ export class ExitViewPortEvent extends GameEvent<Entity> {
 }
 
 /**
- * Event thrown on an [[Actor]] when it completely leaves the screen.
+ * Event thrown on an [[Actor]] when any part of the graphics bounds are on screen.
  */
 export class EnterViewPortEvent extends GameEvent<Entity> {
   constructor(public target: Entity) {