how long do you watch tv
According to a study by the Joan Ganz Cooney Center, children between the ages of 2 and 10 spend an average of 2 hours 7 minutes per day with screens. The American Academy of Pediatrics recommends that children not be exposed to any screens before the age of 2. Let us now know how to protect the eyes and ears of children from the screen.
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habit of blinking

According to a study published in The New England Journal of Medicine, while watching a screen, the rate of blinking of the eyelids is halved and this leads to dryness in the eyes. Get your child used to blinking while using TV or gadgets. Take frequent breaks while the child is looking at the screen. If your child is having dryness in the eyes, use eye drops on the advice of an eye specialist.
select large screen

Whenever your child looks at the screen for more than a few minutes, the size of the screen affects the eyes. The bigger the photo on the screen, the less pressure will be on the eyes.
If your child is watching a movie or program, watch it on TV instead of a phone or tablet. However, the size of the screen alone cannot protect the eyes from damage.
Choose the right lighting and brightness

When the child is looking at the screen, there should be good light in his room. Light should not come from behind the screen. Light should come electrical or through a window. If the light is coming from behind the screen, it puts a strain on the child’s eyes as he has to try harder to focus on the screen. The brightness of the screen should not be too dark and too bright than the light of the room, otherwise it will affect the eyes.
how to protect ears

Generally, headphones should not be given to children below the age of three, but if your child uses them, keep their volume low. Keep the volume down to 50% of the device’s volume level. This causes less damage to the child’s ears.
Reference:
https://www.healthychildren.org/English/health-issues/conditions/eyes/Pages/What-Too-Much-Screen-Time-Does-to-Your-Childs-Eyes.aspx
https://www.joanganzcooneycenter.org/wp-content/uploads/2014/01/jgcc_learningathome.pdf