Screens are NOT the reason kids need glasses 👀

The video discusses how children's eyeballs grow and the resulting vision issues when they grow too long. Initially, eyeballs grow to focus light correctly on the retina, but in recent decades, many children's eyeballs continue to grow, causing blurry vision. This was initially thought to be due to screen time, but recent findings suggest a lack of a hormone, which is formed with adequate light exposure, is the cause. Children today spend less time outdoors, leading to insufficient hormone production and continued eyeball growth, resulting in widespread blurry vision.

How do the muscles in the eye help with focusing on objects?

What is the significance of the hormone mentioned in the text?