The cinema has come over a century back and it took the world by storm and at the same time, the caution regarding its effect on eye- sight was also surfaced. Later, the Television has arrived, followed by cable network, which is followed by caution regarding its effect on eye - sight. The mobile phone has greeted the 21 st century, which is followed with the present smart phone age and its usage has become so extensive that it is severely cautioned that its over usage damages the eye-sight of the users.
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