What are some of the bad habits which affect kids' (3-8 yrs) eyesight? How can parents ensure good eyesight for children.

Just to add on, here are a couple of tips to protect your child’s eyesight: Having a balanced diet: A well balanced diet with green and red leafy vegetables like carrots, spinach and beetroot, also yellow fruits like papayas and mangoes (high in carotene). Take breaks: Try to remind your child to take a break after 20 mins of staring at the computer/tv screen. Best to look at some greenery that are a distance away. These are very basic but would be good for maintaining good eyesight. It may be difficult to take such frequent breaks. I find sitting near the window a good way to facilitate that. By having the computer near the window, one simply need to look out every once in a while. Really helps with reducing fatigue in the eyes.