--- title: Posture, screens and resting your eyes — a lesson of Mova's school · trees and pragmatics description: «Posture, screens and resting your eyes», a lesson of the everyday course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Your head is heavy, about as heavy as a big bag of flour, and when you bend it far forward over a phone, your neck muscles have to --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Everyday](https://md.mova.elamur.ai/free/en/corpora/school/everyday/) / Posture, screens and resting your eyes # Posture, screens and resting your eyes Lesson 8 of the everyday course of Mova's primary school: 19 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/everyday/8-posture-and-screens/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/0/) — Your head is heavy, about as heavy as a big bag of flour, and when you bend it far forward over a phone, your neck muscles have to hold it up like a long fishing rod, so they get sore. - [2](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/2/) — When you stare at a screen your eyes focus close for a long time and you blink less, so they get tired and dry; the 20-20-20 rule helps: every 20 minutes look at something about 20 feet (6 metres) away for 20 seconds. - [3](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/3/) — Bodies are made to move, so get up and move about every half hour, and play outdoors every day: time in daylight helps protect children's eyes from becoming short-sighted. - [4](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/4/) — A boy in Vancouver playing a game puts a timer on, and when it rings he looks out of the window at the far trees and walks around the room. - [5](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/5/) — A boy in Toronto played on his tablet in bed until midnight every night; he got headaches, fell asleep in class and his marks went down until his family put the tablet away at bedtime. - [6](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/6/) — A girl in Brisbane spent almost every afternoon hunched over a phone indoors; she started to find the board at school blurry, and the eye doctor said she needed glasses and more time outside. - [7](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/7/) — An adult's head weighs about 5 kilograms. - [8](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/8/) — Bending your head far forward over a phone strains the muscles of your neck. - [9](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/9/) — A good screen is about an arm's length away, with its top near eye level. - [10](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/10/) — When you sit, your back should be supported and your feet flat on the floor or a footrest. - [11](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/11/) — People blink less when they stare at a screen, so their eyes can feel dry. - [12](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/12/) — The 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. - [13](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/13/) — Looking at something far away lets the focusing muscles of the eyes relax. - [14](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/14/) — Sitting still for a long time makes muscles stiff, so you should get up and move often. - [15](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/15/) — Playing outdoors in daylight helps protect children's eyes from becoming short-sighted (seeing far-away things blurry). - [16](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/16/) — Bright screens and exciting games just before bed make it harder to fall asleep. - [17](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/17/) — Reading in dim light can make your eyes tired, but it does not damage them for good. - [18](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/18/) — Light from screens late in the evening makes it harder to fall asleep. - [19](https://md.mova.elamur.ai/free/en/corpora/school/everyday/8-posture-and-screens/19/) — Children who spend more time outdoors are less likely to become short-sighted. - ← previous: [Swimming basics and water confidence](https://md.mova.elamur.ai/free/en/corpora/school/everyday/7-swimming-and-water/) - next →: [Tiredness, hunger and thirst: the body's signals](https://md.mova.elamur.ai/free/en/corpora/school/everyday/9-body-signals/) - ↑ back to [Everyday](https://md.mova.elamur.ai/free/en/corpora/school/everyday/)