diff --git a/example-blur/readme.md b/example-blur/readme.md
index fddc2da..ba8f8d1 100644
--- a/example-blur/readme.md
+++ b/example-blur/readme.md
@@ -3,7 +3,7 @@
 ## Description
 This example demonstrates two different blur methods (gaussian and normalized box) and a method to compute the focus amount of an image.
 Focus computation is useful for objects (and especially iris) detection.
-You can find more about focus computation on the appendix of *How Iris Recognition Works* by Paul Daugman (p.29).
+You can find more about focus computation on the appendix of [*How Iris Recognition Works* by Paul Daugman](http://www.cl.cam.ac.uk/~jgd1000/csvt.pdf) (p.29).
 
 ## Running
 Console displays computed focus amount.
diff --git a/example-blur/src/ofApp.cpp b/example-blur/src/ofApp.cpp
index 083e6dd..e44ad86 100644
--- a/example-blur/src/ofApp.cpp
+++ b/example-blur/src/ofApp.cpp
@@ -1,3 +1,18 @@
+/*
+# example-blur
+
+## Description
+This example demonstrates two different blur methods (gaussian and normalized box) and a method to compute the focus amount of an image.
+Focus computation is useful for objects (and especially iris) detection.
+You can find more about focus computation on the appendix of [*How Iris Recognition Works* by Paul Daugman](http://www.cl.cam.ac.uk/~jgd1000/csvt.pdf) (p.29).
+
+## Running
+Console displays computed focus amount.
+Use space bar to toggle between blur methods.
+Use 'a' and 'z' to de- / in-crease blur amount.
+See the result on focus computation.
+*/
+
 #include "ofApp.h"
 
 void ofApp::setup() {