Earlier we depended on books and other writing materials. Now we depend more on computers. Depending on computer for useful purposes is good. But we should not sit continuously before computer for very long for sake of health.
Anything that is useful enables us to earn money. We may earn money by any useful skill such as sports, writing, computer operation, dancing, accountancy etc.
computer has many applications. We may combine our basic skill with computer application and earn more. I am a tax consultant. I use software for searching legal decisions of courts. This helps to do the legal work faster. similarly, doctors use computer for diagnosis and various researches.
Santosh- True we are here due to internet. There are also online academic courses and other commercial services like advertising, buying and selling. One may use computer and internet according to skill.
It is a good question.I think the kind of the role that IT has been playing we can not help spending hours before a system.Some exercises and correct postures of the body and the position of the computer may help us in dealing with these issues.
WE can do some simple exercises after every 1 hour while working on computer. For example we can get up from our seat and stretch our body and roll our eyes in all the direction and then try to see distant object and finally close eyes for some moment.