Eyes - we use our eye narrowly while reading, in conversation, watching TV, playing Video games, and on my computer when typing and surfing the Internet.
It could just be an inherited tendency, but it might be also a nutrient deficiency. https://Www.bro-bra.jp/entry/kiyaku.php?url=http%3A%2F%2Fwww.theralife.com%2Focular-rosacea-and-dry-eyes-treatment%2F