diff --git a/README.md b/README.md
index a766541..ce898bd 100644
--- a/README.md
+++ b/README.md
@@ -62,9 +62,9 @@ Once the program started, it initializes a 3D eye model from 2D pupil observatio
In this initialization step, a user needs to smoothly rotate his/her eye to capture various 2D shapes of the eye.
-After the step, we get 3D eye tracking:
+After the step, we get 3D eye tracking. The current version updates the eye model over time (drift correction), represented by the white circle.
-
+
### Tips: