Smartphone has become a significant device in our daily
life. According to research in 2013 by A. Smith from Pew
Research Center [1], over 56 percent of people who owned
mobile phones in United States were using smartphones.
Another work by eMarketer [2] suggested that by 2016, about
2.16 billion consumers worldwide will own a smartphone, and
by 2018, about 51.7 percent of people who use mobile phone
worldwide will be using smartphone. However, with this rapid
growth of smartphone, it also effects user’s behavior as well.
Some well-known syndromes like Computer Vision Syndrome
[3] are more likely to occur with smartphone users, as
the cause is now not only from a computer screen, but also
smartphone screen. And the new syndrome like smartphone
thumb is also becoming an attention in medical domain.
Another syndrome, which has been around for a while, is neck
pain. Neck pain is usually caused by a bad neck posture, it used
to happen because of a prolonged reading. However, with the
growth of smartphone, people are now using their smartphones