Effects of technology

Nowaday,our life are going forward to tread quickest thing is science and technology, what science and technology rely on is the progress of[with] technique. For example say the computer is a science and technology of technique, the time-consuming work we need before now all depend on computer of science and technology lets us simplify matters a lot, also saving much time, so we can own more techniques that time improves present, let science and technology in this world more simplify matters more environmental protection.
The computer brings our convenience to have a lot, for example say the computer will bring our fast operations, analyzing a successful probability for us, providing us to carry on a recreational activity. The computer will also bring many bad things, for example say over a long period of time use a computer will cause near sight, over a long period of time use a computer will also cause many people indulge lazy have to study or exercise in the electronic game, depending on a computer too will also cause our heads consider gradual degeneration.Although the computer will bring various injury, I believe future science and technology still keep overcoming this kind of problem.
On the medical treatment use if there are no the words of computer, that didn't save the person's science and technology so, the not accurate medical treatment technique would cause more people's dead and injured, what we need is correct usage science and technology, not abuses science and technology.