It is true that watching 
 affects children. While some people believe that the length of 
 spent watching them that has a significant impact on children. In my opinion, it is the content of the program that has a more marked influence on their behaviour.
On the one hand, there are several reasons why watching 
 for long periods of 
 has negative effects on the development of children both  physically and psychologically. 
, children are exposed to intermittent flashes of light from the television, 
 could 
 serious damage to the eyes. 
, it can 
 temporary blindness if children watch 
 excessively. 
,  when children keep their eyes glued to screens for several hours, waves from the television may 
 a headache, even 
 can significantly increase the risk of developing obesity and type 2 diabetes. 
, the enormous amounts of 
 are spent wastefully for electronic devices by young viewers 
 it should be used in more useful activities like reading, exercise and interacting with friends or their relatives. All of the activities are crucial for a healthy lifestyle. 
, When children watch television excessively, they are less likely to be spending 
 developing social skills. 
, the productivity of group work will be decreased if the lack of communication skill.
, it is the broadcasted images that have the most direct effects on young viewers. 
, children are easily manipulated by the adverts which take them to the virtual world. 
, which coax them to purchase products that are not always worth their money. 
, Since 2010, toys of the Star Wars series are very popular among teenagers and sales of these toys are very high in the market. 
, the advertisements are delivered in 
 a way that children start pestering their parents to buy those products. 
, the fast food chain McDonald’s promote their Ads to attract more and more teenagers to eat fast food which is not good for health because  it contains high levels of fats and cholesterol which 
 obesity and diabetes in children.
, these adverts should not be allowed to be shown in mass media
In conclusion, though both two factors have their own implications, I believe that the content is more considerable. 
, parental intervention is essential in controlling children's 
 viewing habits and awareness of children about programs with a healthy mind.