Watching television or working on computers or video display terminals (VDTs) will not harm your eyes. Often, when using a VDT for long periods of time, just as when reading or doing other close work, you blink less often than normal. This reduced rate of blinking makes your eyes dry, which may lead to the feeling of eye strain or reflexive excessive blinking. There is some evidence that excessive indoor reading or viewing of VDT activities can increase myopia, so outdoor activity after school can balance against this.