Can spending too long doing nearsighted activities, such as extensive tv screen time increase a childs risk of developing myopia? especially since watching tv from ages 2 - 4 years old?

There are multifold concerns apart from myopia, the lack of exercise of the eye muscles by being fixed could affect the lens; however there are also lack of physical activities and dangers of exposure to inappropriate programs and programs that could brain wash the children. It is important to allow variety of activites for healthy growth of the eyes brain and the whole body.