Application of this work can be for example a measurement of user’s blink rate with common cameras in order to monitor dry eye syndrome (Divjak and Bischof, 2009). One of the main causes of dry eye syndrome is low blink rate. A healthy human blinks 10 to 15 times per minute. 70% of computer users have decreased blink rate up to 60% (Blehm et al., 2005). Dry eye syndrome is often accompanied by symptoms like eyestrain, soreness, irritation, red eyes or blurred vision. Each blink renews the tear film which protects and moisturizes the eye